kogarkoite
Sign in to saveAlso known as IMA1970-038
Kogarkoite is a sodium sulfate fluoride mineral with formula Na3(SO4)F. It has a pale blue color, a specific gravity of about 2.67 and a hardness of 3.5. The crystal is monoclinic and is a type of naturally occurring antiperovskite. Kogarkoite is named after the Russian petrologist Lia Nikolaevna Kogarko (born 1936) who discovered the mineral.
Key facts
- Mineral.name
- Kogarkoite
- Mineral.image
- Kogarkoite - Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada.jpg
- Mineral.category
- Sulfate mineral
- Mineral.formula
- Na3(SO4)F
- Mineral.IMAsymbol
- Kog
- Mineral.strunz
- 7.BD.15
- Mineral.system
- Monoclinic
- Mineral.class
- Pyramidal (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/m
- Mineral.unit cell
- a = 18.07, b = 6.94 c = 11.44 [Å]; β = 107.72°; Z = 12
- Mineral.color
- Colorless, pale sky-blue, pale pink, lilac
- Mineral.habit
- Tabular crystals, granular, earthy aggregates, pseudorhombohedral
- Mineral.twinning
- Common
- Mineral.mohs
- 3.5
- Mineral.luster
- Vitreous to dull
- Mineral.streak
- White
- Mineral.diaphaneity
- Transparent to translucent
- Mineral.gravity
- 2.66
via Wikipedia infobox
Wikidata facts
- Subclass of
- sulfate mineral
- Image
- Kogarkoite - Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada.jpg
Show 8 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 7.BD.15
- Commons category
- Kogarkoite
- chemical formula
- Na₃SO₄F
- Nickel-Strunz 9th edition (updated 2009)
- 7.BD.15
- type locality (geology)
- Alluaiv Mountain
- streak color
- white
- crystal system
- monoclinic crystal system
- IMA Mineral Symbol
- Kog
Sources (2)
via Wikidata · CC0
~1 min read
Encyclopedic overview
3 sectionsContents
- Discovery and occurrence
- See also
- References
Kogarkoite is a sodium sulfate fluoride mineral with formula Na3(SO4)F. It has a pale blue color, a specific gravity of about 2.67 and a hardness of 3.5. The crystal is monoclinic and is a type of naturally occurring antiperovskite. Kogarkoite is named after the Russian petrologist Lia Nikolaevna Kogarko (born 1936) who discovered the mineral.
==Discovery and occurrence== Kogarkoite was first described in 1973 for an occurrence on Alluaiv Mountain, Lovozero Massif, Kola Peninsula, Russia. On Alluaiv it occurs in pegmatitic veins in nepheline syenite. It occurs with sodalite in syenite xenoliths in an alkali intrusive complex at Mont Saint-Hilaire, Canada. In Hortense Hot Spring, Chaffee County, Colorado, it occurs as a sublimate. It occurs at Lake Natron near Ol Doinyo Lengai, Tanzania and Suswa Volcano, Lake Magadi, Kenya.
Excerpted from Wikipedia’s “kogarkoite” article, available under the CC BY-SA 4.0 licence.