chlormayenite
Sign in to saveAlso known as mayenite, brearleyite, IMA1963-016, Cmy
Chlormayenite (after Mayen, Germany), Ca12Al14O32[☐4Cl2], is a rare calcium aluminium oxide mineral of cubic symmetry.
Key facts
- Mineral.name
- Chlormayenite
- Mineral.image
- Calcium heptaaluminate str.png
- Mineral.caption
- Crystal structure of chlormayenite (Cl− ions are omitted for clarity)
- Mineral.category
- Oxide mineral Mayenite supergroup
- Mineral.formula
- Ca12Al14O32[☐4Cl2]
- Mineral.IMAsymbol
- Cmy
- Mineral.strunz
- 4.CC.20
- Mineral.system
- Cubic
- Mineral.class
- Hextetrahedral (3m) H-M symbol: ( 3m)
- Mineral.symmetry
- I3d
- Mineral.unit cell
- a = 11.98 Å; Z = 2
- Mineral.color
- Colorless
- Mineral.habit
- Microscopic anhedral grains
- Mineral.streak
- White
- Mineral.diaphaneity
- Transparent
- Mineral.gravity
- 2.85
- Mineral.opticalprop
- Isotropic
- Mineral.refractive
- 1.614–1.643
via Wikipedia infobox
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Encyclopedic overview
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- See also
- References
Chlormayenite (after Mayen, Germany), Ca12Al14O32[☐4Cl2], is a rare calcium aluminium oxide mineral of cubic symmetry.
It was originally reported from Eifel volcanic complex (Germany) in 1964. It is also found at pyrometamorphic sites such as in the Hatrurim Formation of Israel and in some burned coal dumps.
Excerpted from Wikipedia’s “chlormayenite” article, available under the CC BY-SA 4.0 licence.