Stillwaterite

Stillwaterite

Stillwater Complex, Montana, USA

Stillwaterite

Fedorovo-Pansky massif, Murmansk Oblast, Russia

Stillwaterite

Stillwater Complex, Montana, USA

Stillwaterite

Fedorovo-Pansky massif, Murmansk Oblast, Russia

Stillwaterite

Stillwater Complex, Montana, USA

Stillwaterite

Fedorovo-Pansky massif, Murmansk Oblast, Russia

About StillwateriteHide

Stillwater Mine

Stillwater Mine, Stillwater County, Montana, USA

Formula:

Pd₈As₃

Lustre:

Metallic

Hardness:

4½

Specific Gravity:

10.96 (Calculated)

Crystal System:

Trigonal

Name:

Named after its discovery locality.

Co-Type Localities:

ⓘ Stillwater Complex, Montana, USA
ⓘ Stillwater Mine, Stillwater County, Montana, USA

Likely polymorphous with arsenopalladinite. One of several Pd arsenide minerals, chemically comparable to isomertieite, Unnamed (Pd Arsenide), etc.

Also compare with UM1993-02-AsTe:Pd.

Unique IdentifiersHide

IMA Classification of StillwateriteHide

Classification of StillwateriteHide

Mineral SymbolsHide

Pronunciation of StillwateriteHide

Physical Properties of StillwateriteHide

Optical Data of StillwateriteHide

Anisotropism:

weak (air; dark gray to brownish gray), distinct (oil, brownish black with a blue to yellow-brown tinge)

Reflectivity:

Wavelength	R1	R2
470nm	51.6%	52.7%
546nm	52.5%	53.2%
589nm	53.1%	53.7%
650nm	54.4%	55.0%

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 55.0%.
R₁ shown in black, R₂ shown in red

Colour in reflected light:

pale creamy gray with faint pinkish tint

Chemistry of StillwateriteHide

Crystallography of StillwateriteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of StillwateriteHide

Synonyms of StillwateriteHide

Other Language Names for StillwateriteHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for StillwateriteHide

References for StillwateriteHide

Localities for StillwateriteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Canada
New Brunswick Kings Co. Cardwell Parish ⓘ Mechanic Settlement Pluton	Canadian Mineralogist 45, 775 Grammatikopoulos, T.A., Hiebert, R.S., Barr, S.M. and Valeyev, O., (2006) Cu-Ni-PGM Mineralization In The Mechanic Settlement Pluton, Southern New Brunswick, Canada. in Geological Association of Canada, Program with Abstracts Volume 31
Nunavut Kivalliq Region ⓘ Ferguson Lake deposit	Campos-Alvarez, N. O., Samson, I. M., & Fryer, B. J. (2012). The roles of magmatic and hydrothermal processes in PGE mineralization, Ferguson Lake deposit, Nunavut, Canada. Mineralium Deposita, 47(4), 441-465.
Ontario Thunder Bay District Coldwell complex ⓘ Marathon deposit	Mcdonald, A.M., Cabri, L.J., Stanley, C.J., Good, D.J., Redpath, J., Lane, G., Spratt, J. & Ames, D.E. (2015) Coldwellite, Pd3Ag2S, a new mineral species from the Marathon deposit, Coldwell complex, Ontario, Canada. Canadian Mineralogist 53, 1-13. Good, D. J., Cabri, L. J., & Ames, D. E. (2017). PGM facies variations for Cu-PGE deposits in the Coldwell Alkaline Complex, Ontario, Canada. Ore Geology Reviews, 90, 748-771.
ⓘ W horizon	Good, D. J., Cabri, L. J., & Ames, D. E. (2017). PGM facies variations for Cu-PGE deposits in the Coldwell Alkaline Complex, Ontario, Canada. Ore Geology Reviews, 90, 748-771.
Lac des Iles Area ⓘ Lac des Iles Complex	Louis J. Cabri and J.H. Gilles Laflamme (1979) Mineralogy of Samples from the Lac Des Iles Area, Ontario. Canmet Report 79-27 Dunning, G.R., Laflamme, J.H.G., Criddle, A.J. (1984) Sopcheite: a second Canadian occurrence, from the Lac-des-Ises Complex, Ontario. The Canadian Mineralogist: 22: 233-237. Hulbert, L. J., Duke, J. M., Eckstrand, O. R., Lydon, J. W., Scoates, R. F. J., Cabri, L. J., & Irvine, T. N. (1998) Geological Environments of Platinum Group elements. Geological Survey of Canada, Open File 1440. Natural Resources Canada.
ⓘ Lac des Iles Mine	D. H. Watkinson and G. Dunning v(1979) Geology and platinum-group mineralization, Lac-des-Iles Complex, northwestern Ontario. Can Mineral 17:453-462 Canadian Mineralogist, Vol.22, pp. 125-136 (1984)
Seeley Lake Area ⓘ Ameranium prospect (Geordie Lake; Macrae)	Good, D. J., Cabri, L. J., & Ames, D. E. (2017). PGM facies variations for Cu-PGE deposits in the Coldwell Alkaline Complex, Ontario, Canada. Ore Geology Reviews, 90, 748-771.
ⓘ Anaconda occurrence (Stillwater Marathon project)	EcoMetrix Reort for Stillwater Canada Inc, Marathon Project (2012) Table 4.1-3
ⓘ Area 41 deposit	Good, D. J., Cabri, L. J., & Ames, D. E. (2017). PGM facies variations for Cu-PGE deposits in the Coldwell Alkaline Complex, Ontario, Canada. Ore Geology Reviews, 90, 748-771. Cao, Y. (2017). Cu-Pd mineralization and exploration geochemistry of the Eastern Gabbro, Coldwell Alkaline Complex, ON, Canada. PhD thesis, University of Western Ontario
Finland
ⓘ Lapland	Törnroos Ragnar, Johanson Bo, Kojonen Kari, 1998. Alluvial nuggets of platinum group minerals and alloys from Finnish Lapland. Geological survey of Finland, Special Paper
Enontekiö ⓘ Miessijoki River	Kojonen, K. K., Tarkian, M., Roberts, A. C., Törnroos, R., & Heidrich, S. (2007). Miessiite, Pd11Te2Se2, a new mineral species from Miessijoki, Finnish Lapland, Finland. The Canadian Mineralogist, 45(5), 1221-1227. 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Pt-Pd selenides from river placers, northern Finland Kari Kojonen (2012) PGE ore potential in the southwestern granulite belt of Northern Finland. Geological Survey of Finland, Report of Investigation 207 pp 64-67
Inari ⓘ Sotajoki River	Kojonen, K., Tarkian, M., Heidrich, S. & Johanson, B. (2014) Placer Platinum-group Minerals from Sotajoki River, Inari, Finland. 12th International Platinum Symposium p259
Portimo complex ⓘ Siika-Kämä PGE Reef	Iljina, M. 1994. The Portimo Layered Igneous Complex - with emphasis on diverse sulphide and platinum-group element deposits. Acta Univ. Oul. A258, 1994
Madagascar
Atsinanana Toamasina II District Sahambala ⓘ Ranomena	Grieco, G., Merlini, A., Cazzaniga, A., Moroni, M. (2010) Platinum Group Minerals of Ranomena chromitite, Tamatave district, Madagascar. General Meeting of the International Mineralogical Association: Bonds and bridges, Department of Mineralogy, Geochemistry and Petrology.
Norway
Troms og Finnmark Porsanger ⓘ Karenhaugen PGE Deposit	Nilsson, Lars Petter, Larsen, Rune B. (1998) Edle mineraler i mafiske og ultramafiske bergarter- en oppsummering av platinagruppe mineraler (PGM) funnet i Norge i de senere år. Norsk Bergverksmuseum Skrift, 14. 40-49
Russia
Krasnoyarsk Krai Taymyrskiy Autonomous Okrug Taimyr Peninsula Putoran Plateau Noril'sk Talnakh Cu-Ni Deposit ⓘ Southern-2 orebody	Kalugin, Valery, Viktor Gusev, Nadezhda Tolstykh, Andrey Lavrenchuk, and Elena Nigmatulina. (2021) "Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia" Minerals 11, no. 11: 1258. https://doi.org/10.3390/min11111258
Murmansk Oblast Fedorovo-Pansky massif (Pana layered complex) ⓘ Eastern Pana block	33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Platinum-group minerals in the PGE deposit of the Fedorovo-Pansky layered intrusion, Kola Peninsula
ⓘ Fedorova Tundra block	Groshev, N.Y. Rundkvist, T.V. Karykowski, B.T. Maier, W.D. Korchagin, A.U. Ivanov, A.N. 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Platinum-group minerals in the PGE deposit of the Fedorovo-Pansky layered intrusion, Kola Peninsula Junge, M. (2019) Low-Sulfide Platinum–Palladium Deposits of the Paleoproterozoic Fedorova–Pana Layered Complex, Kola Region, Russia. Minerals 9, 764.
ⓘ FT-1 reef	Groshev, N.Y. Rundkvist, T.V. Karykowski, B.T. Maier, W.D. Korchagin, A.U. Ivanov, A.N. Junge, M. (2019) Low-Sulfide Platinum–Palladium Deposits of the Paleoproterozoic Fedorova–Pana Layered Complex, Kola Region, Russia. Minerals 9, 764.
ⓘ FT-2 reef	Groshev, N.Y. Rundkvist, T.V. Karykowski, B.T. Maier, W.D. Korchagin, A.U. Ivanov, A.N. Junge, M. (2019) Low-Sulfide Platinum–Palladium Deposits of the Paleoproterozoic Fedorova–Pana Layered Complex, Kola Region, Russia. Minerals 9, 764.
ⓘ Kievey deposit	Groshev, N.Y. Rundkvist, T.V. Karykowski, B.T. Maier, W.D. Korchagin, A.U. Ivanov, A.N. Junge, M. (2019) Low-Sulfide Platinum–Palladium Deposits of the Paleoproterozoic Fedorova–Pana Layered Complex, Kola Region, Russia. Minerals 9, 764.
ⓘ North Kamennik deposit	Groshev, N.Y. Rundkvist, T.V. Karykowski, B.T. Maier, W.D. Korchagin, A.U. Ivanov, A.N. Junge, M. (2019) Low-Sulfide Platinum–Palladium Deposits of the Paleoproterozoic Fedorova–Pana Layered Complex, Kola Region, Russia. Minerals 9, 764. Ivanov, A. N., Chernyavsky, A. V., Groshev, N. Y., & Savchenko, E. E. (2020, July). PGM assemblages from the lower ore bodies of the North Kamennik palladium deposit, Kola Region, Russia. In IOP Conference Series: Earth and Environmental Science (Vol. 539, No. 1, p. 012151). IOP Publishing.
ⓘ Northern PGE reef	33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Platinum-group minerals in the PGE deposit of the Fedorovo-Pansky layered intrusion, Kola Peninsula
ⓘ Southern PGE Reef	Groshev, N.Y. Rundkvist, T.V. Karykowski, B.T. Maier, W.D. Korchagin, A.U. Ivanov, A.N. Junge, M. (2019) Low-Sulfide Platinum–Palladium Deposits of the Paleoproterozoic Fedorova–Pana Layered Complex, Kola Region, Russia. Minerals 9, 764.
Monche tundra intrusion ⓘ Loypishnyun deposit	Chashchin, V. V., Petrov, S. V., & Drogobuzhskaya, S. V. (2018). Loypishnyun Low-Sulfide Pt–Pd Deposit of the Monchetundra Basic Massif, Kola Peninsula, Russia. Geology of Ore Deposits, 60(5), 418-448.
Monchegorsk ⓘ Vuruchuaivench prospect	33 IGC excursion No 48, August 15 – 21, 2008
Republic of Karelia Loukhsky District Oulanka plutonic complex Olanga River (Oulanka River) ⓘ Lukkulaisvaara ultrabasic Massif (Lukkulaisvaara pluton; Lukkulaisvaara layered intrusion)	Grishaenko, M. V. P., & Federation, R. (2007). Independent Report on the Shalozerskoe (Burakovsky), Lukkulaisvaara and Tsipringa Platinum, Palladium, Copper, Nickel Deposits in the Autonomous Republic of Karelia Russian Federation
Sverdlovsk Oblast Nizhnii Tagil Volkovskii Cu-Fe-V-Au-Pd complex ⓘ Baronskoe-Kluevsky Pd-Au deposit	Zaccarini, F., Anikina, E., Pusharev, E., Rusin., I., Garuti, G. (2004): Palladium and gold minerals from the Baronskoe-Kluevsky ore deposit (Volkovsky complex, Central Urals, Russia). Mineral. Petrol.: 82: 137–156
ⓘ Syum-Keu Ophiolite Massif	Gurskaya, L. (2002). The Syum-Keu Massif, the Polar Urals: First Data on PGE Mineralization and Implications for Petrogenesis of Layered Complexes. 9th International Platinum Symposium. Abstract. [https://nicholas.duke.edu/people/faculty/boudreau/9thPtSymposium/Gurskaya_Abstract.pdf]
South Africa
Limpopo Sekhukhune District Municipality Fetakgomo Tubatse Local Municipality Burgersfort ⓘ Maandagshoek farm	Melcher, F., Oberthür, T., Lodziak, J. (2005) Modification of detrital platinum-group minerals from the eastern Bushveld Complex, South Africa. The Canadian Mineralogist, 43(5), 1711-1734.
Waterberg District Municipality Modimolle-Mookgophong Local Municipality Mookgophong ⓘ Waterberg deposit	Oberthür, T., Melcher, F., Fusswinkel, T., van den Kerkhof, A. M., & Sosa, G. M. (2018). The hydrothermal Waterberg platinum deposit, Mookgophong (Naboomspruit), South Africa. Part 1: Geochemistry and ore mineralogy. Mineralogical Magazine, 82(3), 725-749.
Mogalakwena Local Municipality Mogalakwena Mokopane ⓘ Sandsloot mine	Holwell, D. A., McDonald, I., & Armitage, P. E. B. (2006). Platinum-group mineral assemblages in the Platreef at the Sandsloot Mine, northern Bushveld Complex, South Africa. Mineralogical Magazine, 70(1), 83-101. HOLWELL D.A., MCDONALD I. & ARMITAGE, P.E.B. (2006). Platinum-group mineral assemblages in the Platreef at the South Central Pit, Sandsloot Mine, northern Bushveld Complex, South Africa. Mineralogical Magazine, 70, 83-101.
USA
Alaska Kodiak Island Borough Tugidak Island ⓘ Southern beach placer	Belkin, H. E., & Grosz, A. E. (2021). Platinum and gold placer from Tugidak Island, Alaska: Platinum-group minerals and their inclusions, gold, and chromite mineralogy. The Canadian Mineralogist, 59(4), 667-712.
Montana ⓘ Stillwater Complex (TL)	Canadian Mineralogist (1975) 13:321-335 Canadian Mineralogist Vol.24, pp. 329-346 (1986)
Stillwater County Blakely Creek ⓘ Frog Pond	Canadian Mineralogist Vol.24, pp. 329-346 (1986)
ⓘ Stillwater Mine (TL)	Gobla, Michael J. (2012) Montana Mineral Locality Index. Rocks & Minerals, 87 (3) 208-240 doi:10.1080/00357529.2012.676825