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Penroseite
Pyrite Group
.
History
Activities related to discovery and approval of the group members
Structural context
Penroseite
Crystal System
isometric
Crystal Class
diploidal
Space Group
Pa-3
a
5.901—5.9629 (5.932)
b
5.901—5.9629 (5.932)
c
5.901—5.9629 (5.932)
alpha
90
beta
90
gamma
90
volume
205.483—212.018 (208.7505)
Based on
2
measurements
Chemical context
Stoichiometric formulas
Penroseite
mindat.org
March 13, 2023
(Ni,Co,Cu)Se
2
Puse NiSe
2
is known as a synthetic phase (see also
kullerudite
).
IMA
March 13, 2023
(Ni,Co,Cu)Se
2
mineralogy.rocks
Aug. 30, 2022
(Ni,Co,Cu)Se
2
Elements recorded on EPMA
2
Ni
2
Se
1
P
Physical properties
Color
Color entities, recognized using a custom trained NER model
steel-gray
Color note
Original color note from the source
Steel-gray
Streak
Streak entities, recognized using a custom trained NER model
Streak note
Original streak note from the source
Black
Lustre
Metallic
Fracture
Sub-Conchoidal
Transparency
Opaque
Tenacity
brittle
Hardness
2.5—3
Measured density
6.58—6.74
Calculated density
6.7
Penroseite | mineralogy.rocks