Contribution

(Pt,Pd) (Bi,Sb), a new mineral

Tarkian, M.; Stumpfl, E. F.

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Neues Jahrbuch für Mineralogie - Monatshefte Jg. 1974 Heft 11 (1974), p. 514 - 517

7 références bibliographiques

publié: Dec 23, 1974

DOI: 10.1127/njmm/1974/1974/514

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ArtNo. ESP156197411004, Prix: 19.00 €

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Abstract

A new mineral, (Pt,Pd) (Bi,Sb) has been discovered in platinum concentrates from the Driekop Mine, Transvaal, S. Africa. Spectral reflectance: R470=49.7—55.7, R546 = 56.2—62.0, R589 = 59.4—66.4 and R650 = 62.6—69.0. VHN15.25 = 301—352. Electron probe microanalysis gives Pt 36.7, Pd 10.7, Bi 32.1, Sb 16.2, As 4.4 and Sn 0.8%. The small grainsize (maximum 35 μ) and complex intergrowths with other platinum minerals have precluded X-ray investigation. The intense anisotropy and comparison with the binary end members PtSb, PtBi and the intermediate phase Pt (Sb, Bi), stumpflite, suggest that the new mineral has also hexagonal symmetry and NiAs-type structure.

Mots-clefs

New description • new mineral data • Pt • Pd • Bi • Sb • reflectivity • microprobe; Transvaal (Driekop Mine)