Key facts
- Mineral.name
- Putnisite
- Mineral.image
- Putnisite.jpg
- Mineral.caption
- Putnisite, from Polar Bear Peninsula, Western Australia, Australia
- Mineral.formula
- SrCa4Cr83+(CO3)8(SO4)(OH)16·25 H2O
- Mineral.IMAsymbol
- Pni
- Mineral.system
- Orthorhombic
- Mineral.class
- Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
- Mineral.symmetry
- Pnma
- Mineral.unit cell
- a = 15.351 Å, b = 20.421 Å, c = 18.270 Å; Z = 4
- Mineral.color
- Purple
- Mineral.habit
- Pseudocubic crystals
- Mineral.cleavage
- [100], [010] and [001] good
- Mineral.fracture
- Brittle – uneven
- Mineral.mohs
- 1.5–2
- Mineral.luster
- Vitreous
- Mineral.refractive
- nα = 1.552, nβ = 1.583 and nγ = 1.599
- Mineral.opticalprop
- Biaxial (−)
- Mineral.pleochroism
- Distinct: X pale bluish grey, Y pale purple, Z pale purple
via Wikipedia infobox
Wikidata facts
- Subclass of
- carbonate and nitrate class of minerals
- Named after
- duo
- Image
- PutnisiteAndreRobbemond FOV03mm-2.jpg
Show 7 more facts
- chemical formula
- SrCa₄Cr³⁺₈(CO₃)₈SO₄(OH)₁₆·25H₂O
- streak color
- pink
- IMA Mineral Symbol
- Pni
- color
- purple
- time of discovery or invention
- 2014-01-01
- crystal system
- orthorhombic crystal system
- Commons category
- Putnisite
via Wikidata · CC0