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| Name: | Ettringite Ett |
| Specimens in Collection: |  #674: Ettringite Kalahari Manganese Field, South Africa |
| IMA Chemistry: | Ca6Al2(SO4)3(OH)12·27H2O |
| Chemistry Elements: | The mineral Ettringite contains elements: Calcium (Ca) Aluminum (Al) Sulfur (S) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | Germany |
| Year First Published: | 1874 |
| IMA Status: | Approved |
| Status Notes: | Lehmann J (1874) Über den Ettringit, ein neues Mineral, in Kalkeinschlüssen der Lava von Ettringen (Laacher Gebiet). Neues Jahrbuch für Mineralogie, Geologie und Palaontologie 1874, 273-275 Chemical formula revised from Ca_6_Al_2_(SO_4_)_3_(OH)_12_·26H_2_O: Gatta G D, Hålenius U, Bosi F, Cañadillas-Delgado L, Fernandez-Diaz M T (2019) Minerals in cement chemistry: A single-crystal neutron diffraction study of ettringite, Ca_6_Al_2_(SO_4_)_3_(OH)_12_·27H_2_O. American Mineralogist 104, 73-78 |
| Structural Group Name: | Ettringite |
| Fleischer's Group Name: | ettringite |
| Crystal Systems: | hexagonal |
| Oldest Known Age: | 2400 Million Years Ago |
| Mohs Hardness: | 2.25 |
| Diaphaneity: | 1.0 |
| Specific Gravity: | 1.77 |
| More Info: | Search Wikipedia: Ettringite (Wiki) Search Mindat: Ettringite Search Web Mineral DB: Ettringite |
Data appearing on this page is derived from the IMA Database of Mineral Properties. Not all properties are applicable to or available for all minerals.