agrellite
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Agrellite () is a rare triclinic inosilicate mineral with four-periodic single chains of silica tetrahedra.
Key facts
- Mineral.name
- Agrellite
- Mineral.category
- Inosilicates
- Mineral.image
- Museo di mineralogia, pietre fluorescenti, agrellite 3.JPG
- Mineral.caption
- Agrellite showing fluorescence in ultraviolet light
- Mineral.formula
- NaCa2Si4O10F
- Mineral.IMAsymbol
- Are
- Mineral.strunz
- 9.DH.75
- Mineral.system
- Triclinic
- Mineral.class
- Pinacoidal () (same H-M symbol)
- Mineral.symmetry
- P
- Mineral.color
- White, grayish-white, greenish-white
- Mineral.habit
- Lath - shaped like a small, thin plaster lath, rectangular in shape
- Mineral.cleavage
- perfect [110]
- Mineral.mohs
- 5.5
- Mineral.luster
- pearly
- Mineral.refractive
- nα = 1.567 nβ = 1.579 nγ = 1.581
- Mineral.opticalprop
- biaxial
- Mineral.birefringence
- δ = 0.014
via Wikipedia infobox
Wikidata facts
- Image
- Museo di mineralogia, pietre fluorescenti, agrellite 3.JPG
Show 5 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.DH.75
- chemical formula
- NaCa₂Si₄O₁₀F
- Commons category
- Agrellite
- Nickel-Strunz 9th edition (updated 2009)
- 9.DH.75
- IMA Mineral Symbol
- Are
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Agrellite () is a rare triclinic inosilicate mineral with four-periodic single chains of silica tetrahedra.
It is a white to grey translucent mineral, with a pearly luster and white streak. It has a Mohs hardness of 5.5 and a specific gravity of 2.8. Its type locality is the Kipawa Alkaline Complex, Quebec, Canada, where it occurs as tabular laths in pegmatite lenses. Other localities include Murmansk Oblast, Russia, Dara-i-Pioz Glacier, Tajikistan, and Saima Complex, Liaoning, China. Common associates at the type locality include zircon, eudialyte, vlasovite, miserite, mosandrite-(Ce), and calcite.