braggite
Sign in to saveBraggite is a sulfide mineral of platinum, palladium and nickel with chemical formula: (Pt, Pd, Ni)S. It is a dense (specific gravity of 10), steel grey, opaque mineral which crystallizes in the tetragonal crystal system. It is the central member in the platinum group end-members cooperite and vysotskite.
Key facts
- Mineral.mohs
- 1.5
- Mineral.name
- Braggite
- Mineral.image
- Braggite-612271.jpg
- Mineral.caption
- Braggite
- Mineral.category
- Sulfide mineral
- Mineral.formula
- (Pt,Pd,Ni)S
- Mineral.IMAsymbol
- Bg
- Mineral.strunz
- 2.CC.35a
- Mineral.dana
- 2.8.5.3
- Mineral.system
- Tetragonal
- Mineral.class
- Dipyramidal (4/m) H-M symbol: (4/m)
- Mineral.symmetry
- P42/m
- Mineral.unit cell
- a = 6.367 Å, c = 6.561 Å; Z = 8
- Mineral.color
- Steel grey; white in reflected light
- Mineral.habit
- Prismatic crystals and rounded grains
- Mineral.twinning
- Rarely observed
- Mineral.cleavage
- None
- Mineral.luster
- Metallic
via Wikipedia infobox
~4 min read
Encyclopedic overview
6 sectionsContents
- Composition
- Geologic occurrence
- Atomic structure
- Physical properties
- Discovery and naming
- References
Braggite is a sulfide mineral of platinum, palladium and nickel with chemical formula: (Pt, Pd, Ni)S. It is a dense (specific gravity of 10), steel grey, opaque mineral which crystallizes in the tetragonal crystal system. It is the central member in the platinum group end-members cooperite and vysotskite.
It was first described in 1932 for an occurrence in the Bushveld Igneous Complex of South Africa. Its name came from William Henry Bragg (1862–1942) and his son, William Lawrence Bragg (1890–1971). It was the first mineral that was discovered with the assistance of X rays.
Excerpted from Wikipedia’s “braggite” article, available under the CC BY-SA 4.0 licence.