Petrology of Al- and Cr-rich ophiolitic chromitites from the Muğla, SW Turkey: implications from composition of chromite, solid inclusions of platinum-group mineral, silicate, and base-metal mineral, and Os-isotope geochemistry

2009 ◽  
Vol 158 (5) ◽  
pp. 659-674 ◽  
Author(s):  
İbrahim Uysal ◽  
Mahmud Tarkian ◽  
M. Burhan Sadiklar ◽  
Federica Zaccarini ◽  
Thomas Meisel ◽  
...  
Keyword(s):  
Base Metal ◽  
Isotope Geochemistry ◽  
Platinum Group Mineral ◽  
Group Mineral ◽  
Sw Turkey ◽  
Platinum Group ◽  
Os Isotope

Variation in Platinum Group Mineral and Base Metal Sulfide Assemblages in the Lower Group Chromitites of the Western Bushveld Complex, South Africa

2018 ◽  
Vol 56 (5) ◽  
pp. 723-743 ◽  
Author(s):  
Kai Bachmann ◽  
Inga Osbahr ◽  
Raimon Tolosana-Delgado ◽  
Deshenthree Chetty ◽  
Jens Gutzmer
Keyword(s):  
South Africa ◽  
Base Metal ◽  
Bushveld Complex ◽  
Metal Sulfide ◽  
Platinum Group Mineral ◽  
Base Metal Sulfide ◽  
Group Mineral ◽  
Platinum Group ◽  
Lower Group

Genesis of an exotic platinum-group-mineral-rich and Mg-poor chromitite in the Kevitsa Ni-Cu-platinum-group-elements deposit

2021 ◽  
Author(s):  
Igor González-Pérez ◽  
Fernando Gervilla ◽  
José M. González-Jiménez ◽  
Kari Kojonen
Keyword(s):  
Platinum Group Elements ◽  
Platinum Group Mineral ◽  
Group Mineral ◽  
Platinum Group

Platinum-group mineral characterisation in concentrates from low-grade PGE chromitites from the Vourinos ophiolite complex, northern Greece

2006 ◽  
Vol 115 (2) ◽  
pp. 49-57 ◽  
Author(s):  
A. Kapsiotis ◽  
T. A. Grammatikopoulos ◽  
F. Zaccarini ◽  
B. Tsikouras ◽  
G. Garuti ◽  
...  
Keyword(s):  
Platinum Group Mineral ◽  
Low Grade ◽  
Northern Greece ◽  
Ophiolite Complex ◽  
Group Mineral ◽  
Platinum Group

Nipalarsite, Ni8Pd3As4, a new platinum-group mineral from the Monchetundra Intrusion, Kola Peninsula, Russia

2019 ◽  
Vol 83 (6) ◽  
pp. 837-845 ◽  
Author(s):  
Tatiana L. Grokhovskaya ◽  
Oxana V. Karimova ◽  
Anna Vymazalová ◽  
František Laufek ◽  
Dmitry A. Chareev ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Empirical Formula ◽  
Layered Intrusion ◽  
Mean Value ◽  
Platinum Group Mineral ◽  
X Ray Diffraction ◽  
Wavelength Dispersive Spectroscopy ◽  
Group Mineral ◽  
X Ray ◽  
Platinum Group

AbstractNipalarsite, Ni8Pd3As4, is a new platinum-group mineral discovered in the sulfide-bearing orthopyroxenite of the Monchetundra layered intrusion, Kola Peninsula, Russia (67°52′22″N, 32°47′60″E). Nipalarsite forms anhedral grains (5–80 µm in size) in intergrowths with sperrylite, kotulskite, hollingworthite, isomertieite, menshikovite, palarstanide, nielsenite and monchetundtraite enclosed in pentlandite, anthophyllite, actinolite and chlorite. Nipalarsite is brittle, has a metallic lustre and a grey streak. In plane-polarised light, nipalarsite is light grey with a blue tinge. Reflectance values in air (in %) are: 46.06 at 470 nm, 48.74 at 546 nm, 50.64 at 589 nm and 54.12 at 650 nm. Values of VHN20 fall between 400.5 and 449.2 kg.mm–2, with a mean value of 429.9 kg.mm–2, corresponding to a Mohs hardness of ~4. The average result of 27 electron microprobe wavelength dispersive spectroscopy analyses of nipalarsite is (wt.%): Ni 44.011, Pd 28.74, Fe0.32, Cu 0.85, Pt 0.01, Au 0.05, As 25.42, Sb 0.05, Te 0.39, total 99.85. The empirical formula (normalised to 15 atoms per formula unit) is: (Ni8.10Fe0.06)Σ8.16(Pd2.94Cu0.18)Σ3.12(As3.68Te0.03)Σ3.71 or, ideally, Ni8Pd3As4. Nipalarsite is cubic, space group Fm$\bar{3}$m, with a = 11.4428(9) Å, V = 1498.3(4) Å3 and Z = 8. The strongest lines in the powder X-ray diffraction pattern of synthetic Ni8Pd3As4 [d, Å (I) (hkl)] are: 2.859(10)(004), 2.623(6)(313), 2.557(6)(024), 2.334(11)(224), 2.201(35)(115,333), 2.021(100)(044), 1.906(8)(006,244) and 1.429(7)(008). The crystal structure was solved and refined from the single-crystal X-ray diffraction data of synthetic Ni8Pd3As4. The relation between natural and synthetic nipalarsite is illustrated by an electron back-scattered diffraction study of natural nipalarsite. The density calculated on the basis of the empirical formula of nipalarsite is 9.60 g.cm–3. The mineral name corresponds to the three main elements: Ni, Pd and As.

Biological role in the transformation of platinum-group mineral grains

2016 ◽  
Vol 9 (4) ◽  
pp. 294-298 ◽  
Author(s):  
Frank Reith ◽  
Carla M. Zammit ◽  
Sahar S. Shar ◽  
Barbara Etschmann ◽  
Ralph Bottrill ◽  
...  
Keyword(s):  
Platinum Group Mineral ◽  
Biological Role ◽  
Group Mineral ◽  
Platinum Group

The role of dithiophosphate as a co-collector in the flotation of a platinum group mineral ore

2012 ◽  
Vol 36-38 ◽  
pp. 100-104 ◽  
Author(s):  
K.C. Corin ◽  
J.C. Bezuidenhout ◽  
C.T. O’Connor
Keyword(s):  
Platinum Group Mineral ◽  
Group Mineral ◽  
Platinum Group
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