combeite
Sign in to saveCombeite is a rare silicate mineral with the formula Na2Ca2Si3O9. It has a trigonal crystal system.
Wikidata facts
- Image
- Combeite.jpg
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- chemical formula
- Na₂Ca₂Si₃O₉
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.CJ.15a
- Nickel-Strunz 9th edition (updated 2009)
- 9.CJ.15
- crystal system
- trigonal crystal system
- streak color
- white
- Commons category
- Combeite
- IMA Mineral Symbol
- Cbe
- Strunz 8th edition (series ID, updated)
- VIII/C.07
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Encyclopedic overview
2 sectionsContents
- Discovery and occurrence
- References
Combeite is a rare silicate mineral with the formula Na2Ca2Si3O9. It has a trigonal crystal system.
==Discovery and occurrence== It was first described in 1957 for an occurrence in nephelinite lavas and tephra on Mount Nyiragongo, Goma, Kivu, Democratic Republic of Congo (then Zaïre). It has also been reported from the Bellerberg volcano in Ettringen, Germany and the Oldoinyo Lengai volcano, Tanzania. It was named for Arthur Delmar Combe of the Geological Survey of Uganda.
Excerpted from Wikipedia’s “combeite” article, available under the CC BY-SA 4.0 licence.