Platinum copper

• In nature, the mineral Hongsiite - PtCu with an admixture of iron is found ^[1] .

• Fusion of stoichiometric amounts of pure substances:

${\displaystyle \mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">P</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">t</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">+</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">C</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">u</span></span>}\stackrel{{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">800</span></span>}}^{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">o</span></span>}}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">C</span></span>}}{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">\to </span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">C</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">u</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">P</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">t</span></span>}}${\ displaystyle {\ mathsf {Pt + Cu \ {\ xrightarrow {800 ^ {o} C}} \ CuPt}}}  

Platinum-copper forms crystals of trigonal syngony , the cell parameters a = 0.788 nm, α = 91 ° ^{[2] [3] [4]} .

The compound is formed by a solid-state reaction at a temperature of 812 ° C and has a wide homogeneity range of 35–60 at. % platinum

• Yu, T.-H., Lin, S.-J., Chao, P., Fang, C.-S., Huang, C.-S. (1974): A preliminary study of some new minerals of the platinum group and another associated new one in platinum-bearing intrusion in a region in China. Acta Geologica Sinica, 2, 202-218. Peng, Z., Chang, C., Ximen, L. (1978): Discussion on published articles in the research of new minerals of the platinum-group discovered in China in recent years. Acta Geologica Sinica, 4, 326-336. Ding, K. (1980): Further studies of the minerals “isoplatincopper” and “hongshiite”. Scientia Geologica Sinica, 2, 168-171. Cabri, LJ (1981): Platinum group elements: mineralogy, geology, recovery. Canadian Institute of Mining, Metallurgy and Petroleum, 54, 109.
• Yu Zuxiang (1982): New data on hongshiite. Bulletin of the Institute of Geology, Chinese Academy of Sciences 1982 (4), 75-81 (in Chinese with English abstract). - American Mineralogist (1984), 69, 411-412 (abstract).
• Kwitko, R., Cabral, AR, Lehmann, B., Laflamme, JHG, Cabri, LJ, Criddle, AJ, and Galbiatti, HF (2002) Hongshiite, PtCu, from itabirite-hosted Au-Pd-Pt mineralization (jacutinga) , Itabira district, Minas Gerais, Brazil. Canadian Mineralogist: 40: 711-723.