Liroconite
Cu2Al(AsO4)(OH)4·4H2OIMA symbol: Lrograndfathered
Liroconite is a phosphate, arsenate, or vanadate mineral with the formula Cu2Al(AsO4)(OH)4·4H2O, crystallizing in the monoclinic system. It has a Mohs hardness of 2-2.5, typically blue or green in color, with a resinous or vitreous luster, a specific gravity of 2.882. Its streak is blue or green.
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Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | I 1 2/a 1 |
| Cell (Å, °) | a = 12.664, b = 7.563, c = 9.914; α = 90, β = 91.32, γ = 90 |
| Cell volume | 949.289 ų, Z = 4 |
| Axial ratios | 1.6745:1:1.3109calculated from COD 9007883 |
| Source structure | COD 9007883 (Acta Crystallographica, Section C, 1991) |
Physical properties
| Density (calculated) | 2.946 g/cm³calculated from COD 9007883 |
|---|---|
| Hardness (Mohs) | 2-2.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 2.882 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | blue, greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | light bluesingle sourceWikidata (CC0) blue, greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | resinous, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 433.08 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Cu 29.35%, Al 6.23%, As 17.3%, O 44.33%, H 2.79% |
Classification
| Nickel-Strunz (10th) | 8.DF.20Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.DF.20Wikidata (CC0) |