| Name: | Brownmillerite Bmlr |
| IMA Chemistry: | Ca2Fe3+AlO5 |
| Chemistry Elements: | The mineral Brownmillerite contains elements: Calcium (Ca) Iron (Fe) Aluminum (Al) Oxygen (O) |
| Country of Type Locality: | Germany |
| Year First Published: | 1963 |
| IMA Status: | Approved |
| Status Notes: | Name was previously used by the cement industry for the synthetic compound: Hentschel G (1964) Mayenit, 12CaO·7Al2O3, und Brownmillerit, 2CaO·(Al,Fe)2O3, zwei neue Minerale in den Kalksteinschlüssen der Lava des Ettringer Bellerberges, Neues Jahrbuch für Mineralogie, Monatshefte 1964, 22-29 Chemical formula revised: Redhammer G J, Tippelt G, Roth G, Amthauer G (2004) Structural variations in the brownmillerite series Ca_2_(Fe_2-x_Al_x_)O_5_: Single-crystal X-ray diffraction at 25°C and high-temperature X-ray powder diffraction (25°C< T <1000°C), American Mineralogist 89, 405-420 |
| Structural Group Name: | Perovskite, Brownmillerite |
| Fleischer's Group Name: | |
| Crystal Systems: | orthorhombic |
| Oldest Known Age: | 354 Million Years Ago |
| Diaphaneity: | 3.0 |
| Specific Gravity: | 3.76 |
| More Info: | Search Wikipedia: Brownmillerite (Wiki) Search Mindat: Brownmillerite Search Web Mineral DB: Brownmillerite |