Putnisit
Sign in to saveAlso known as IMA2011-106, Pni
thumb|Putnisite (animation) Putnisite is a mineral composed of strontium, calcium, chromium, sulfur, carbon, oxygen and hydrogen. It was discovered on the Polar Bear Peninsula in Shire of Dundas, Western Australia in 2007 during mining activity. Following identification and recognition by the IMA in 2012 the mineral was named after mineralogists Andrew and Christine Putnis. The formal description was published in 2014.
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