Almarudite
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Almarudite (IMA symbol: Alr[1]) is an extremely rare alkaline manganese beryllium silicate mineral of the cyclosilicates (ring silicates) class, with the chemical formula K([ ],Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30], from the volcanic environment of the Eifel Mountains in Germany.[2][3]
| Almarudite | |
|---|---|
| General | |
| Category | Minerals |
| Formula | K([ ],Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30] |
| IMA symbol | Alr |
| Identification | |
| Color | Yellow to orange |
| Cleavage | None Observed |
| Fracture | Irregular/Uneven |
| Mohs scale hardness | 6 |
| Luster | Vitreous |
| Streak | Pale orange |
| Diaphaneity | Transparent, Translucent |
| Specific gravity | 2.714 |
References
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