spurrite
Sign in to saveSpurrite is a white, yellow or light blue mineral with monoclinic crystals. Its chemical formula is Ca5(SiO4)2CO3.
Key facts
- Mineral.name
- Spurrite
- Mineral.category
- Nesosilicate
- Mineral.image
- Spurrite Calcium silicate and carbonate Luna county New mexico 1873.jpg
- Mineral.caption
- Spurrite from New Mexico
- Mineral.formula
- Ca5(SiO4)2CO3
- Mineral.IMAsymbol
- Spu
- Mineral.strunz
- 9.AH.15
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/a
- Mineral.color
- Gray, gray white to lilac gray
- Mineral.habit
- Massive to granular
- Mineral.twinning
- Polysynthetic twins on [001] and [101]
- Mineral.cleavage
- Distinct on [100]
- Mineral.fracture
- Uneven to splintery
- Mineral.mohs
- 5
- Mineral.luster
- vitreous to resinous
- Mineral.refractive
- nα = 1.640–1.641 nβ = 1.674–1.676 nγ = 1.679–1.681
via Wikipedia infobox
Wikidata facts
- Named after
- Josiah E. Spurr
- Image
- Spurrite-540261.jpg
Show 8 more facts
- Commons category
- Spurrite
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.AH.15
- Nickel-Strunz 9th edition (updated 2009)
- 9.AH.15
- streak color
- white
- Mohs' hardness
- 5
- IMA Mineral Symbol
- Spu
- chemical formula
- Ca₅(SiO₄)₂(CO₃)
- Strunz 8th edition (series ID, updated)
- VIII/A’.06a
Sources (2)
via Wikidata · CC0
~2 min read
Encyclopedic overview
3 sectionsContents
- Discovery and occurrence
- Cement manufacture contaminant
- References
Spurrite is a white, yellow or light blue mineral with monoclinic crystals. Its chemical formula is Ca5(SiO4)2CO3.
Spurrite is generally formed in contact metamorphism zones as mafic magmas are intruded into carbonate rocks. Spurrite's space group is P 2/a. It is biaxial with a birefringence of 0.0390–0.0400, giving second order red interference colors when viewed under crossed polarizers in a petrographic microscope.
Excerpted from Wikipedia’s “spurrite” article, available under the CC BY-SA 4.0 licence.