پلاديوم

عودة للموسوعة

پلاديوم

پلاديوم,  46Pd
الخصائص العامة
النطق
  • //
المظهر أبيض فضي
الوزن الذري العياري (Ar, standard) 106.42(1)
پلاديوم في الجدول الدوري
Ni

Pd

Pt
روديوم ← پلاديوم → فضة
الرقم الذري (Z) 46
المجموعة، الدورة المجموعة 10, الفترةخمسة
المستوى الفرعي المستوى الفرعي d
التوزيع الإلكتروني [Kr] 4d10
الإلكترونات بالغلاف
2, 8, 18, 18
الخصائص الطبيعية
الطور (عند STP) صلب
نقطة الانصهار 1828.05 K ​(1554.9 °س، ​2830.82 °F)
نقطة الغليان 3236 K ​(2963 °س، ​5365 °ف)
الكثافة (بالقرب من د.ح.غ.) 12.023 ج/سم³
حينقد يكون سائلاً (عند ن.إ.) 10.38 ج/سم³
حرارة الانصهار 16.74 kJ/mol
حرارة التبخر 358 kJ/mol
السعة الحرارية المولية 25.98 J/(mol·K)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1721 1897 2117 2395 2753 3234
الخصائص الذرية
حالات الأكسدة 0, +1, +2, +3, +4, +5, +6 ​(a أكسيد قاعدي معتدل)
الكهرسلبية مقياس پاولنگ: 2.20
طاقات التأين
  • الأول: 804.4 kJ/mol
  • الثاني: 1870 kJ/mol
  • الثالث: 3177 kJ/mol
نصف القطر الذري empirical: 137 pm
نصف قطر التكافؤ 139±6 pm
نصف قطر ڤان در ڤالز 163 pm
الخطوط الطيفية
متفرقات
البنية البلورية ​مكعب متوسطن حول الوجه
[[File:مكعب متوسطن حول الوجه|50px|alt=مكعب متوسطن حول الوجه crystal structure for پلاديوم|مكعب متوسطن حول الوجه crystal structure for پلاديوم]]
سرعة الصوت thin rod 3070 m/s (at 20 °C)
التمدد الحراري 11.8 µm/(m·K) (at 25 °C)
التوصيل الحراري 71.8 W/(m·K)
المقاومة الكهربائية 105.4 nΩ·m (at 20 °C)
الترتيب المغناطيسي مغناطيسية مسايرة
معامل يونگ 121 GPa
معامل القص 44 GPa
معاير الحجم 180 GPa
نسبة پواسون 0.39
صلادة موز 4.75
صلادة ڤيكرز 400–600 MPa
صلادة برينل 320–610 MPa
رقم كاس 7440-05-3
التاريخ
التسمية على اسم الكويكب پالاس، الذي هونفسه مسمى على اسم پالاس أثينا
الاكتشاف وأول عزل وليام هايد ولاستون (1803)
نظائر پلاديوم الرئيسية
نظير التوافر عمر النصف (t1/2) نمط الاضمحلال النواتج
100Pd إصط 3.63 d ε Rh
γ 0.084, 0.074,
0.126
102Pd 1.02% () 1.1720 Ru
103Pd syn 16.991 d ε Rh
104Pd 11.14% (SF) <18.969
105Pd 22.33% (SF) <18.247
106Pd 27.33% (SF) <16.806
107Pd طفيف  y 0.033 Ag
108Pd 26.46% (SF) <16.102
110Pd 11.72% y 1.9997 Cd
أنماط الانحلال بين الأقواس هي متسقطة، إلا أنها لم تُرصد
| المراجع | [[:d:خطأ لوا في وحدة:Wikidata على السطر 866: attempt to index field 'wikibase' (a nil value).|في ويكي‌داتا]]

الپلاديوم Palladium عنصر كيميائي من الجدول الدوري، ورمزه Pd ، ورقمه الذري 46. وهوفلز انتنطقي نادر، من مجموعة البلاتين. ويشبه البلاتين كيميائياً. ويستخرج من خامي النحاس والنيكل. ويستخدم كعامل مساعد وفي صناعة المجوهرات. الپلاديوم كان قد اكتشفه وليام هايد ولاستون William Hyde Wollaston عام 1803. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them.

More than half the supply of palladium and its congener platinum is used in catalytic converters, which convert as much as 90% of the harmful gases in automobile exhaust (hydrocarbons, carbon monoxide, and nitrogen dioxide) into less noxious substances (nitrogen, carbon dioxide and water vapor). Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, groundwater treatment, and jewelry. Palladium is a key component of fuel cells, which react hydrogen with oxygen to produce electricity, heat, and water.

Ore deposits of palladium and other PGMs are rare. The most extensive deposits have been found in the norite belt of the Bushveld Igneous Complex covering the Transvaal Basin in South Africa; the Stillwater Complex in Montana, United States; the Sudbury Basin and Thunder Bay District of Ontario, Canada; and the Norilsk Complex in Russia. Recycling is also a source, mostly from scrapped catalytic converters. The numerous applications and limited supply sources result in considerable investment interest.

الطلب العالمي على الپلاديوم ارتفع من 100 طن في 1990 إلى نحو300 طن في 2000. الانتاج العالمي من المناجم كان 222 طن متري في 2006 حسب بيانات USGS. معظم الپالاديوم يستخدم في catalytic converters صناعة السيارات.

الخصائص

الپالاديوم.

الپالاديوم هومعدن فضي أبيض طري يشبه الپلاتين. Palladium belongs to group 10 in the periodic table, but the configuration in the outermost electrons are in accordance with Hund's rule. Electrons in the s-shell migrate to fill the d orbitals because they have less energy.

Z العنصر No. of electrons/shell
28 نيكل 2, 8, 16, 2 (or 2, 8, 17, 1)
46 پلاديوم 2, 8, 18, 18
78 پلاتين 2, 8, 18, 32, 17, 1
110 دارمشتاتيوم 2, 8, 18, 32, 32, 16, 2 (متسقط)


التصوير

باستخدام طريقة الطباعة باستعمال platinotype فباستطاعة المصورين حتى ينتجوا أعمالاً فنية راقية باستعمال أملاح الپلاتين أوالپالاديوم. ولما كان غالباً ما يستعمل مع الپلاتين, فإن الپالاديوم يمنح بديلاً للفضة.

المركبات

انظر أيضا تصنيف: مركبات الپلاديوم

مركبات الپلاديوم تتواجد أساساً في حالات الأكسدة 0 و+2 oxidation state. Other less common states are also recognized. Generally the compounds of palladium are more similar to those of platinum than those of any other element.

Structure of α-PdCl2
Structure of β-PdCl2

پلاديوم(II)

كلوريد الپلاديوم(II) هوالمادة البادئة الرئيسية لمركبات الپلاديوم الأخرى. It arises by the reaction of palladium with chlorine. It is used to prepare heterogeneous palladium catalysts such as palladium on barium sulfate, palladium on carbon, and palladium chloride on carbon. Solutions of PdCl2 in nitric acid react with acetic acid to give palladium(II) acetate, also a versatile reagent. PdCl2 reacts with ligands (L) to give square planar complexes of the type PdCl2L2. One example of such complexes is the benzonitrile derivative PdX2(PhCN)2.

PdCl2 + 2 L → PdCl2L2 (L = PhCN, PPh3, NH3, etc)

The complex bis(triphenylphosphine)palladium(II) dichloride is a useful catalyst.

خلات الپلاديوم(II)

پلاديوم(0)

Palladium forms a range of zerovalent complexes with the formula PdL4, PdL3 and PdL2. For example, reduction of a mixture of PdCl2(PPh3)2 and PPh3 gives tetrakis(triphenylphosphine)palladium(0):

2 PdCl2(PPh3)2 + أربعة PPh3 +خمسة → 2 Pd(PPh3)4 + N2 + أربعة N2H5+Cl

Another major palladium(0) complex, tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3), is prepared by reducing sodium tetrachloropalladate in the presence of dibenzylideneacetone.

Palladium(0), as well as palladium(II), are catalysts in coupling reactions, as has been recognized by the 2010 Nobel Prize in Chemistry to Richard F. Heck, Ei-ichi Negishi, and Akira Suzuki. Such reactions are widely practiced for the synthesis of fine chemicals. Prominent coupling reactions include the Heck, Suzuki, Sonogashira coupling, Stille reactions, and the Kumada coupling. Palladium(II) acetate, tetrakis(triphenylphosphine)palladium(0) (Pd(PPh3)4, and tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3) serve either as catalysts or precatalysts.


حالات أكسدة أخرى

بالرغم من حتى مركبات Pd(IV) هم نسبياً نادرون، فأحد الأمثلة هوsodium hexachloropalladate(IV), Na2[PdCl6]. A few compounds of palladium(III) are also known. Palladium(VI) was claimed in 2002, but subsequently disproven.

Mixed valence palladium complexes exist, e.g. Pd4(CO)4(OAc)4Pd(acac)2 forms an infinite Pd chain structure, with alternatively interconnected Pd4(CO)4(OAc)4 and Pd(acac)2 units.

تاريخ

وليام هايد ولاستون

الپلاديوم كان قد اكتشفه وليام هايد ولاستون William Hyde Wollaston عام 1803. وكان ولاستون قد سمّى هذا العنصر عام 1804 على اسم المذنّب پالاس Pallas, والذي كان قد اكتُشِف قبل عامين.

التواجد

انتاج الپالاديوم في 2005

في 2005, روسيا كانت المنتج الأكبر للپالاديوم بحصة لا تقل عن 50% من الانتاج العالمي ويتبعها جنوب أفريقيا, الولايات المتحدة وكندا, حسب British Geological Survey.

Applications

Cross section of a metal-core catalytic converter
The Soviet 25-rouble commemorative palladium coin is a rare example of the monetary usage of palladium.

The largest use of palladium today is in catalytic converters. Palladium is also used in jewelry, dentistry,watch making, blood sugar test strips, aircraft spark plugs, surgical instruments, and electrical contacts. Palladium is also used to make professional transverse (concert or classical) flutes. As a commodity, palladium bullion has ISO currency codes of XPD and 964. Palladium is one of only four metals to have such codes, the others being gold, silver and platinum. Because it absorbs hydrogen, palladium is a key component of the controversial cold fusion experiments that began in 1989.


Catalysis

When it is finely divided, as with palladium on carbon, palladium forms a versatile catalyst; it speeds heterogeneous catalytic processes like hydrogenation, dehydrogenation, and petroleum cracking. Palladium is also essential to the Lindlar catalyst, also called Lindlar's Palladium. A large number of carbon–carbon bonding reactions in organic chemistry are facilitated by palladium compound catalysts. For example:

  • Heck reaction
  • Suzuki coupling
  • Tsuji-Trost reactions
  • Wacker process
  • Negishi reaction
  • Stille coupling
  • Sonogashira coupling

(See palladium compounds and palladium-catalyzed coupling reactions.)

When dispersed on conductive materials, palladium is an excellent electrocatalyst for oxidation of primary alcohols in alkaline media. Palladium is also a versatile metal for homogeneous catalysis, used in combination with a broad variety of ligands for highly selective chemical transformations.

In 2010, palladium-catalysed organic reactions were recognized by the Nobel Prize in Chemistry. A 2008 study showed that palladium is an effective catalyst for carbon-fluoride bonds.

Catalytic cycle for Kumada cross coupling reaction, which is widely used in the synthesis of fine chemicals.

Palladium catalysis is primarily employed in organic chemistry and industrial applications, although its use is growing as a tool for synthetic biology; in 2017, effective in vivo catalytic activity of palladium nanoparticles was demonstrated in mammals to treat disease.

Electronics

The second greatest application of palladium in electronics is in multilayer ceramic capacitors in which palladium (and palladium-silver alloy) is used for electrodes. Palladium (sometimes alloyed with nickel) is used for component and connector plating in consumer electronics and in soldering materials. The electronic sector consumed 1.07 million troy ounces (33.2 tonnes) of palladium in 2006, according to a Johnson Matthey report.

Technology

Hydrogen easily diffuses through heated palladium, and membrane reactors with Pd membranes are used in the production of high purity hydrogen. Palladium is used in palladium-hydrogen electrodes in electrochemical studies. Palladium(II) chloride readily catalyzes carbon monoxide gas to carbon dioxide and is useful in carbon monoxide detectors.

Hydrogen storage

Palladium readily absorbs hydrogen at room temperatures, forming palladium hydride PdHx with x less than 1. While this property is common to many transition metals, palladium has a uniquely high absorption capacity and does not lose its ductility until x approaches 1. This property has been investigated in designing an efficient, inexpensive, and safe hydrogen fuel storage medium, though palladium itself is currently prohibitively expensive for this purpose. The content of hydrogen in palladium can be linked to magnetic susceptibility, which decreases with the increase of hydrogen and becomes zero for PdH0.62. At any higher ratio, the solid solution becomes diamagnetic.

Dentistry

Palladium is used in small amounts (about 0.5%) in some alloys of dental amalgam to decrease corrosion and increase the metallic lustre of the final restoration.

Jewelry

Palladium has been used as a precious metal in jewelry since 1939 as an alternative to platinum in the alloys called "white gold", where the naturally white color of palladium does not require rhodium plating. Palladium is much less dense than platinum. Similar to gold, palladium can be beaten into leaf as thin as 100 nm (1250,000 in). Unlike platinum, palladium may discolor at temperatures above 400 °م (752 °ف); it is relatively brittle.[]

Prior to 2004, the principal use of palladium in jewelry was the manufacture of white gold. Palladium is one of the three most popular alloying metals in white gold (nickel and silver can also be used). Palladium-gold is more expensive than nickel-gold, but seldom causes allergic reactions (though certain cross-allergies with nickel may occur).

When platinum became a strategic resource during World War II, many jewelry bands were made out of palladium. Palladium was little used in jewelry because of the technical difficulty of casting. With the casting problem resolved[] the use of palladium in jewelry increased, originally because platinum increased in price while the price of palladium decreased. In early 2004, when gold and platinum prices rose steeply, China began fabricating volumes of palladium jewelry, consuming 37 tonnes in 2005. Subsequent changes in the relative price of platinum lowered demand for palladium to 17.4 tonnes in 2009. Demand for palladium as a catalyst has increased the price of palladium to about 50% higher than that of platinum in January 2019.

In January 2010, hallmarks for palladium were introduced by assay offices in the United Kingdom, and hallmarking became mandatory for all jewelry advertising pure or alloyed palladium. Articles can be marked as 500, 950, or 999 parts of palladium per thousand of the alloy.

Fountain pen nibs made from gold are sometimes plated with palladium when a silver (rather than gold) appearance is desired. Sheaffer has used palladium plating for decades, either as an accent on otherwise gold nibs or covering the gold completely.

Photography

In the platinotype printing process, photographers make fine-art black-and-white prints using platinum or palladium salts. Often used with platinum, palladium provides an alternative to silver.

Toxicity

پلاديوم
المخاطر
ن.م.ع. مخطط تصويري
ن.م.ع. حدثة الاشارة Warning
ن.م.ع. عبارات المخاطر
H317
ن.م.ع. العبارات الاحتياطية
P261, P273, P280, P302+352, P321, P333+313, P363, P501
(معيـَّن النار)
Flammability code 0: لن يشتعل. مثل الماء Health code 0: التعرض تحت ظروف النار لن يشكل خطراً أكثر من مادة عادية قابلة للاشتعال. مثل كلوريد الصوديوم Reactivity code 0: مستقر في العادة، حتى تحت ظروف التعرض للنار، ولا يتفاعل مع الماء. مثل النيتروجين السائل Special hazards (white): no codeNFPA 704 four-colored diamond

Palladium is a metal with low toxicity. It is poorly absorbed by the human body when ingested. Plants such as the water hyacinth are killed by low levels of palladium salts, but most other plants tolerate it, although tests show that, at levels above 0.0003%, growth is affected. High doses of palladium could be poisonous; tests on rodents suggest it may be carcinogenic, though no clear evidence indicates the element harms humans.

Precautions

Like other platinum-group metals, bulk Pd is quite inert. Although contact dermatitis has been reported, data on the effects are limited. It has been shown that people with an allergic reaction to palladium also react to nickel, making it advisable to avoid the use of dental alloys containing palladium on those so allergic.

Some palladium is emitted with the exhaust gases of cars with catalytic converters. Between أربعة and 108 ng/km of palladium particulate is released by such cars, while the total uptake from food is estimated to be less than 2 µg per person a day. The second possible source of palladium is dental restoration, from which the uptake of palladium is estimated to be less than 15 µg per person per day. People working with palladium or its compounds might have a considerably greater uptake. For soluble compounds such as palladium chloride, 99% is eliminated from the body within ثلاثة days.

The median lethal dose (LD50) of soluble palladium compounds in mice is 200 mg/kg for oral and 5 mg/kg for intravenous administration.

انظر أيضاً

  • 2000s commodities boom
  • Palladium as an investment
  • Pseudo palladium
  • پلاتين

المصادر

  1. ^ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN .
  2. ^ Standard Atomic Weights 2013. Commission on Isotopic Abundances and Atomic Weights
  3. ^ Platinum Metals Review, Rhodium and Palladium - Events Surrounding Its Discovery, accessedخمسة Feb 2007.
  4. ^ W. H. Wollaston (1804). "On a New Metal, Found in Crude Platina". Philosophical Transactions of the Royal Society of London. 94: 419-430.
  5. ^ J. Kielhorn, C. Melber, D. Keller, I. Mangelsdorf (2002). "Palladium – A review of exposure and effects to human health". International Journal of Hygiene and Environmental Health. 205 (6). doi:10.1078/1438-4639-00180. Text " pages 417-432 " ignored (help)CS1 maint: multiple names: authors list (link)
  6. ^ Mike Ware (2005). "Book Review of : Photography in Platinum and Palladium". Platinum Metals Review. 49 (4): 190–195. doi:10.1595/147106705X70291.
  7. ^ نطقب:OrgSynth
  8. ^ Anderson, Gordon K.; Lin, Minren; Sen, Ayusman; Gretz, Efi (1990). "Bis(Benzonitrile)Dichloro Complexes of Palladium and Platinum". Inorganic Syntheses. Inorganic Syntheses. 28: 60–63. doi:10.1002/9780470132593.ch13. ISBN .
  9. ^ Zalevskaya, O. A; Vorob'eva, E. G; Dvornikova, I. A; Kuchin, A. V (2008). "Palladium complexes based on optically active terpene derivatives of ethylenediamine". Russian Journal of Coordination Chemistry. 34 (11): 855–857. doi:10.1134/S1070328408110110.
  10. ^ نطقب:OrgSynth
  11. ^ Coulson, D. R.; Satek, L. C.; Grim, S. O. (1972). "23. Tetrakis(triphenylphosphine)palladium(0)". Inorg. Synth. Inorganic Syntheses. 13: 121–124. doi:10.1002/9780470132449.ch23. ISBN .
  12. ^ Takahashi, Y; Ito, Ts; Sakai, S; Ishii, Y (1970). "A novel palladium(0) complex; bis(dibenzylideneacetone)palladium(0)". Journal of the Chemical Society D: Chemical Communications (17): 1065. doi:10.1039/C29700001065.
  13. ^ Crabtree, Robert H. (2009). "Application to Organic Synthesis". . John Wiley and Sons. p. 392. ISBN .
  14. ^ Powers, David C; Ritter, Tobias (2011). "Palladium(III) in Synthesis and Catalysis". Higher Oxidation State Organopalladium and Platinum Chemistry. Topics in Organometallic Chemistry. 35. pp. 129–156. doi:10.1007/978-3-642-17429-2_6. ISBN . PMC 3066514. PMID 21461129.
  15. ^ Chen, W; Shimada, S; Tanaka, M (2002). "Synthesis and Structure of Formally Hexavalent Palladium Complexes". Science. 295 (5553): 308–310. doi:10.1126/science.1067027. PMID 11786638.
  16. ^ Crabtree, R. H (2002). "CHEMISTRY: A New Oxidation State for Pd?". Science. 295 (5553): 288–289. doi:10.1126/science.1067921. PMID 11786632.
  17. ^ Aullón, G; Lledós, A; Alvarez, S (2002). "Hexakis(silyl)palladium(VI) or palladium(II with eta2-disilane ligands?". Angewandte Chemie (International Ed. In English). 41 (11): 1956–9. PMID 19750645.
  18. ^ Sherer, E. C; Kinsinger, C. R; Kormos, B. L; Thompson, J. D; Cramer, C. J (2002). "Electronic structure and bonding in hexacoordinate silyl-palladium complexes". Angewandte Chemie (International Ed. In English). 41 (11): 1953–6. PMID 19750644.
  19. ^ Yin, Xi; Warren, Steven A; Pan, Yung-Tin; Tsao, Kai-Chieh; Gray, Danielle L; Bertke, Jeffery; Yang, Hong (2014). "A Motif for Infinite Metal Atom Wires". Angewandte Chemie International Edition. 53 (51): 14087–14091. doi:10.1002/anie.201408461. PMID 25319757.
  20. ^ Platinum Metals Review, Rhodium and Palladium - Events Surrounding Its Discovery, accessedخمسة Feb 2007.
  21. ^ W. H. Wollaston (1804). "On a New Metal, Found in Crude Platina". Philosophical Transactions of the Royal Society of London. 94: 419-430.
  22. ^ خطأ استشهاد: وسم <ref> غير سليم؛ لا نص تم توفيره للمراجع المسماة lanl
  23. ^ "Palladium". United Nations Conference on Trade and Development. Archived from the original onستة December 2006. Retrieved 5 February 2007.
  24. ^ Rushforth, Roy (2004). "Palladium in Restorative Dentistry: Superior Physical Properties make Palladium an Ideal Dental Metal". Platinum Metals Review. 48 (1).
  25. ^ Hesse, Rayner W. (2007). "palladium". . Greenwood Publishing Group. p. 146. ISBN .
  26. ^ Toff, Nancy (1996). . Oxford University Press. p. 20. ISBN .
  27. ^ Weithers, Timothy Martin (2006). "Precious Metals". . p. 34. ISBN .
  28. ^ Brown, William Henry; Foote, Christopher S; Iverson, Brent L (2009). "Catalytic reduction". . Cengage Learning. p. 270. ISBN .
  29. ^ Tsuji, Jiro (2004). . John Wiley and Sons. p. 90. ISBN .
  30. ^ Drahl, Carmen (2008). "Palladium's Hidden Talent". Chemical & Engineering News. 86 (35): 53–56. doi:10.1021/cen-v086n035.p053.
  31. ^ Miller, Miles A; Askevold, Bjorn; Mikula, Hannes; Kohler, Rainer H; Pirovich, David; Weissleder, Ralph (2017). "Nano-palladium is a cellular catalyst for in vivo chemistry". Nature Communications. 8: 15906. doi:10.1038/ncomms15906. PMC 5510178. PMID 28699627.
  32. ^ Zogbi, Dennis (3 February 2003). "Shifting Supply and Demand for Palladium in MLCCs". TTI, Inc.
  33. ^ Mroczkowski, Robert S. (1998). . McGraw-Hill Professional. pp. 3–. ISBN .
  34. ^ Harper, Charles A. (1997). . McGraw-Hill Professional. pp. 580–. ISBN .
  35. ^ Jollie, David (2007). "Platinum 2007" (PDF). Johnson Matthey. Archived from the original (PDF) on 2008-02-16.
  36. ^ خطأ استشهاد: وسم <ref> غير سليم؛ لا نص تم توفيره للمراجع المسماة CRC
  37. ^ Shu, J.; Grandjean, B. P. A.; Neste, A. Van; Kaliaguine, S. (1991). "Catalytic palladium-based membrane reactors: A review". The Canadian Journal of Chemical Engineering. 69 (5): 1036. doi:10.1002/cjce.5450690503.
  38. ^ Allen, T. H.; Root, W. S. (1955). "An improved palladium chloride method for the determination of carbon monoxide in blood". The Journal of Biological Chemistry. 216 (1): 319–323. PMID 13252031.
  39. ^ Manchester, F. D.; San-Martin, A.; Pitre, J. M. (1994). "The H-Pd (hydrogen-palladium) System". Journal of Phase Equilibria. 15: 62–83. doi:10.1007/BF02667685.
  40. ^ Greenwood, N. N. (1997). Chemistry of the Elements (2nd Edition ed.). Oxford:Butterworth-Heinemann. ISBN . Unknown parameter |coauthors= ignored (|author= suggested) (help)CS1 maint: extra text (link)
  41. ^ Grochala, Wojciech; Edwards, Peter P. (2004). "Thermal Decomposition of the Non-Interstitial Hydrides for the Storage and Production of Hydrogen". Chemical Reviews. 104 (3): 1283–316. doi:10.1021/cr030691s. PMID 15008624.
  42. ^ Mott, N. F. and Jones, H. (1958) The Theory of Properties of metals and alloys. Oxford University Press. ISBN 0-486-60456-X. p. 200
  43. ^ Colon, Pierre; Pradelle-Plasse, Nelly; Galland, Jacques (2003). "Evaluation of the long-term corrosion behavior of dental amalgams: influence of palladium addition and particle morphology". Dental Materials. 19 (3): 232–9. doi:10.1016/S0109-5641(02)00035-0. PMID 12628436.
  44. ^ Gupta, Dinesh C.; Langer, Paul H.; ASTM Committee F-1 on Electronics (1987). . ASTM International. pp. 273–. ISBN .
  45. ^ Hindsen, M.; Spiren, A.; Bruze, M. (2005). "Cross-reactivity between nickel and palladium demonstrated by systemic administration of nickel". Contact Dermatitis. 53 (1): 2–8. doi:10.1111/j.0105-1873.2005.00577.x. PMID 15982224.
  46. ^ Holmes, E. (13 February 2007). "Palladium, Platinum's Cheaper Sister, Makes a Bid for Love". Wall Street Journal (Eastern edition). pp. B.1.
  47. ^ "Platinum-Group Metals" (PDF). Mineral Yearbook 2009. United States Geological Survey. January 2007.
  48. ^ "Platinum-Group Metals" (PDF). Mineral Yearbook 2006. United States Geological Survey. January 2007.
  49. ^ "Johnson Matthey Base Prices". 2019. Retrieved 7 January 2019.
  50. ^ Ware, Mike (2005). "Book Review of : Photography in Platinum and Palladium". Platinum Metals Review. 49 (4): 190–195. doi:10.1595/147106705X70291.
  51. ^ https://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=373192&brand=ALDRICH&PageToGoToURL=https%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Faldrich%2F373192%3Flang%3Den
  52. ^ Emsley, John (2011). Nature's Building Blocks: An A-Z Guide to the Elements. Oxford University Press. pp. 384, 387. ISBN .
  53. ^ Kielhorn, Janet; Melber, Christine; Keller, Detlef; Mangelsdorf, Inge (2002). "Palladium – A review of exposure and effects to human health". International Journal of Hygiene and Environmental Health. 205 (6): 417–32. doi:10.1078/1438-4639-00180. PMID 12455264.
  54. ^ Zereini, Fathi; Alt, Friedrich (2006). "Health Risk Potential of Palladium". . Springer Science & Business. pp. 549–563. ISBN .
  55. ^ Wataha, J. C.; Hanks, C. T. (1996). "Biological effects of palladium and risk of using palladium in dental casting alloys". Journal of Oral Rehabilitation. 23 (5): 309–20. doi:10.1111/j.1365-2842.1996.tb00858.x. PMID 8736443.
  56. ^ Aberer, Werner; Holub, Henriette; Strohal, Robert; Slavicek, Rudolf (1993). "Palladium in dental alloys – the dermatologists' responsibility to warn?". Contact Dermatitis. 28 (3): 163–5. doi:10.1111/j.1600-0536.1993.tb03379.x. PMID 8462294.
  57. ^ Wataha, John C.; Shor, Kavita (2010). "Palladium alloys for biomedical devices". Expert Review of Medical Devices. 7 (4): 489–501. doi:10.1586/erd.10.25. PMID 20583886.

وصلات خارجية

  • Palladium in depth - Online Encyclopedia
  • WebElements.com - Palladium
  • Platinum Metals Review E-Journal
  • Current and Historical Palladium Price
  • Palladium Futures Charts
تاريخ النشر: 2020-06-05 07:28:02
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