Mineral name
|
Brownmillerite
| 
Height: 8 cm, width 9 cm |
Hölzel-No.
|
4.CE.700 |
Type of specimen
|
HT |
IMA-No. / Accepted
|
1963-017 |
Chemical formula
|
Ca2(Al, Fe)2O5 |
Type locality
|
Germany, Rhineland-Palatinate, Eifel, Ettringer Bellerberg near Mayen |
Associated minerals
|
Mayenite, calcite, wollastonite, gehlenite, larnite, diopside, grossular, pyrrhotite, spinel, ettringite, portlandite, hydrocalumite, jasmundite, vaterite, tobermorite, thaumasite |
Collection
|
GeoMuseum - Universität zu Köln |
Contact person
|
Dr. Rolf Hollerbach |
Catalogue−No. / Site
|
M5026/86 / Stahlschrank Systematiksammlung |
Nature of
type specimen
|
Intergrowth of mayenite (colourless), brownmillerite (dark reddish brown) and further associated minerals (grain size of brownmillerite max. 150 µm) |
References
Mayenit, 12CaO·7Al2O3, und Brownmillerit, 2CaO·(Al, Fe)2O3, zwei neue Minerale in den Kalksteineinschlüssen der Lava des Ettringer Bellerberges
Hentschel, G. (1964)
N. Jb. Miner. Mh., 22-29 |
Notes / Further information
Sample B3, original material from the dissertation of G. Hentschel (University of Cologne, 1964). |
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