Minrecordite | |
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General | |
Category | Carbonate minerals Dolomite group |
Formula (repeating unit) | CaZn(CO3)2 |
IMA symbol | Mrd [1] |
Strunz classification | 5.AB.10 |
Crystal system | Trigonal |
Crystal class | 3 Rhomboehedral |
Identification | |
Color | White, colourless |
Crystal habit | Typically rhombohedral crystals saddle-shaped, twisted |
Cleavage | Very good on [10-14] |
Mohs scale hardness | 3.5–4 |
Luster | Pearly |
Streak | White |
Diaphaneity | Translucent |
Specific gravity | 3.45 |
References | [2] [3] [4] |
Minrecordite, CaZn(CO3)2, is a very rare mineral belonging to the dolomite group, the member with Ca and Zn. It was discovered, associated with dioptase, in a specimen from the Tsumeb mine (Namibia), which is consequently its type locality. Its name is a tribute to The Mineralogical Record magazine, representing the collaboration between professional and amateur mineralogists. [5] In this locality it is associated primarily with dioptase, and less frequently with duftite, calcite and malachite. [6] It is a rare mineral, which has been found only in a few deposits in the world. In addition to the type locality, it appears in the Preguiça mine, in Moura, district of Beja ( Portugal). [7]
Minrecordite | |
---|---|
![]() | |
General | |
Category | Carbonate minerals Dolomite group |
Formula (repeating unit) | CaZn(CO3)2 |
IMA symbol | Mrd [1] |
Strunz classification | 5.AB.10 |
Crystal system | Trigonal |
Crystal class | 3 Rhomboehedral |
Identification | |
Color | White, colourless |
Crystal habit | Typically rhombohedral crystals saddle-shaped, twisted |
Cleavage | Very good on [10-14] |
Mohs scale hardness | 3.5–4 |
Luster | Pearly |
Streak | White |
Diaphaneity | Translucent |
Specific gravity | 3.45 |
References | [2] [3] [4] |
Minrecordite, CaZn(CO3)2, is a very rare mineral belonging to the dolomite group, the member with Ca and Zn. It was discovered, associated with dioptase, in a specimen from the Tsumeb mine (Namibia), which is consequently its type locality. Its name is a tribute to The Mineralogical Record magazine, representing the collaboration between professional and amateur mineralogists. [5] In this locality it is associated primarily with dioptase, and less frequently with duftite, calcite and malachite. [6] It is a rare mineral, which has been found only in a few deposits in the world. In addition to the type locality, it appears in the Preguiça mine, in Moura, district of Beja ( Portugal). [7]