Roscoelite
KV3+2(Si3Al)O10(OH)2IMA symbol: Rclapproved
Roscoelite is a silicate mineral with the formula KV3+2(Si3Al)O10(OH)2, crystallizing in the monoclinic system. It has a Mohs hardness of 3.5-4.5, typically brown or green in color, with a pearly luster, a specific gravity of 2.92-2.94. Cleavage is perfect.
Photos
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Physical properties
| Hardness (Mohs) | 3.5-4.5single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
|---|---|
| Specific gravity | 2.92-2.94 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | brown, greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | pearlysingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Cleavage | perfectDana, System of Mineralogy, 6th ed. (1892) |
Classification
| Nickel-Strunz (10th) | 9.EC.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.EC.15Wikidata (CC0) |