Greenalite
(Fe2+,Fe3+)2-3Si2O5(OH)4IMA symbol: Gregrandfathered
Greenalite is a silicate mineral with the formula (Fe2+,Fe3+)2-3Si2O5(OH)4, crystallizing in the monoclinic system. It has a calculated density of 3.056 g/cm3. Its streak is grayish green.
Photos
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Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | C 1 2/m 1 |
| Cell (Å, °) | a = 5.39, b = 9.336, c = 14.166; α = 90, β = 90, γ = 90 |
| Cell volume | 712.848 ų, Z = 4 |
| Axial ratios | 0.5773:1:1.5174calculated from COD 9000132 |
| Source structure | COD 9000132 (American Mineralogist, 1965) |
Physical properties
| Density (calculated) | 3.056 g/cm³calculated from COD 9000132 |
|---|---|
| Streak | grayish greensingle sourceWikidata (CC0) whitesingle sourceWikidata (CC0) |
Classification
| Nickel-Strunz (10th) | 9.ED.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.ED.15Wikidata (CC0) |