Penroseite is a rare selenide mineral with formula (Ni,Co,Cu)Se2. It has a gray-steel color and black streak with a hardness of 3. It is an isometric mineral, 2/m3. Penroseite was first discovered in 1925 in a Bolivian rhyolite. It was named for Richard Penrose (1863–1931), an economic geologist. Penroseite is a rare mineral found in the Pacajake mines in Bolivia. It was discovered in 1925. It used to be found in fissure veins in the extrusive igneous rhyolite rock. It is considered as a member of the pyrite group from the perspective of its structure, with a cubic space group (Bayliss, 1989).
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| - Penroseïta (ca)
- Penroseit (de)
- Penroseita (eu)
- Penroseite (it)
- Penroseite (en)
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| - La penroseïta és un mineral de la classe dels sulfurs que pertany al . Rep el no en honor de Richard Alexander Fullerton Penrose Jr. (17 de desembre de 1863, Filadèlfia, Pennsilvània, EUA - 31 de juliol de 1931), geòleg miner. (ca)
- Penroseita mineral bat da eta pyrita taldearen kidea da. (eu)
- La penroseite è un raro minerale seleniuro con formula chimica (Ni,Co,Cu)Se2. Ha colore grigio metallico, con scalfitura nera. Dal punto di vista della struttura cristallina si considera faccia parte del gruppo delle piriti, in quanto cristallizza nel sistema cubico 2/m3. La penroseite fu scoperta nel 1925 in rocce riolitiche delle miniere di Pacajake nei pressi di Colquechaca in Bolivia. Prende il nome del geologo statunitense R. A. F. Penrose (1863-1931). (it)
- Penroseit, synonym auch Blockit, ist ein selten vorkommendes Mineral aus der Mineralklasse der „Sulfide“ und „Sulfosalze“ mit der idealisierten chemischen Zusammensetzung NiSe2 und damit chemisch gesehen . Als enge Verwandte der Sulfide werden die Selenide in dieselbe Klasse eingeordnet. (de)
- Penroseite is a rare selenide mineral with formula (Ni,Co,Cu)Se2. It has a gray-steel color and black streak with a hardness of 3. It is an isometric mineral, 2/m3. Penroseite was first discovered in 1925 in a Bolivian rhyolite. It was named for Richard Penrose (1863–1931), an economic geologist. Penroseite is a rare mineral found in the Pacajake mines in Bolivia. It was discovered in 1925. It used to be found in fissure veins in the extrusive igneous rhyolite rock. It is considered as a member of the pyrite group from the perspective of its structure, with a cubic space group (Bayliss, 1989). (en)
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| - Penroseite from Pakajake Canyon, Chayanta Province, Potosí Department, Bolivia (en)
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| - Selenide minerals, pyrite group (en)
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- Diploidal (en)
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| - La penroseïta és un mineral de la classe dels sulfurs que pertany al . Rep el no en honor de Richard Alexander Fullerton Penrose Jr. (17 de desembre de 1863, Filadèlfia, Pennsilvània, EUA - 31 de juliol de 1931), geòleg miner. (ca)
- Penroseit, synonym auch Blockit, ist ein selten vorkommendes Mineral aus der Mineralklasse der „Sulfide“ und „Sulfosalze“ mit der idealisierten chemischen Zusammensetzung NiSe2 und damit chemisch gesehen . Als enge Verwandte der Sulfide werden die Selenide in dieselbe Klasse eingeordnet. Penroseit kristallisiert im kubischen Kristallsystem, entwickelt aber nur mikroskopisch kleine Kriställchen und findet sich überwiegend in Form von nierenförmigen, massigen Mineral-Aggregaten mit radialstrahliger, säulenartiger Struktur. Penroseit ist in jeder Form undurchsichtig (opak). Frische Penroseitproben sind von bleigrauer, auf polierten Oberflächen auch cremig-weißgrauer Farbe und zeigen einen metallischen Glanz auf den Oberflächen. Allerdings laufen diese sehr schnell an. (de)
- Penroseita mineral bat da eta pyrita taldearen kidea da. (eu)
- Penroseite is a rare selenide mineral with formula (Ni,Co,Cu)Se2. It has a gray-steel color and black streak with a hardness of 3. It is an isometric mineral, 2/m3. Penroseite was first discovered in 1925 in a Bolivian rhyolite. It was named for Richard Penrose (1863–1931), an economic geologist. Penroseite is a rare mineral found in the Pacajake mines in Bolivia. It was discovered in 1925. It used to be found in fissure veins in the extrusive igneous rhyolite rock. It is considered as a member of the pyrite group from the perspective of its structure, with a cubic space group (Bayliss, 1989). Penroseite makes extensive solid solutions with other minerals. For example, penroseite can be a result of alteration process of many selenides, such as Pb2(SO4)(SeO4). Olsacherite forms very sparingly in well formed crystal covering the walls of the external side of the small cracks (Hurlbut, 1969). Another mineral related to penroseite is . It occurs as an alteration product of uraninite and primary selenium-bearing sulfides, such as penroseite. Piretite forms as crusts in association with an orange masuyite-like U-Pb oxide on the surface of uraninite samples (Vochten, 1996). (en)
- La penroseite è un raro minerale seleniuro con formula chimica (Ni,Co,Cu)Se2. Ha colore grigio metallico, con scalfitura nera. Dal punto di vista della struttura cristallina si considera faccia parte del gruppo delle piriti, in quanto cristallizza nel sistema cubico 2/m3. La penroseite fu scoperta nel 1925 in rocce riolitiche delle miniere di Pacajake nei pressi di Colquechaca in Bolivia. Prende il nome del geologo statunitense R. A. F. Penrose (1863-1931). (it)
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| - {001} Perfect, {011} Distinct (en)
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