Tyrolite
Ca2Cu9(AsO4)4(CO3)(OH)8·11H2OIMA symbol: Tylgrandfathered
Tyrolite is a phosphate, arsenate, or vanadate mineral with the formula Ca2Cu9(AsO4)4(CO3)(OH)8·11H2O, crystallizing in the monoclinic system. It has a Mohs hardness of 1-1.5, typically blue or green in color, with a pearly or vitreous luster, a specific gravity of 3.12. Its streak is green; cleavage is perfect.
Photos
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 1 2/c 1 |
| Cell (Å, °) | a = 27.562, b = 5.5682, c = 10.4662; α = 90, β = 98.074, γ = 90 |
| Cell volume | 1590.33 ų, Z = 2 |
| Axial ratios | 4.9499:1:1.8796calculated from COD 9010102 |
| Source structure | COD 9010102 (American Mineralogist, 2006) — 1 of 2 structures |
Physical properties
| Density (calculated) | 3.276 g/cm³calculated from COD 9010102 |
|---|---|
| Hardness (Mohs) | 1-1.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 3.12 g/cm3corroboratedFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Color | blue, greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | greenDana, System of Mineralogy, 6th ed. (1892) |
| Luster | pearly, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Cleavage | perfectDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 1601.98 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ca 5%, Cu 35.7%, As 18.71%, O 37.95%, C 0.75%, H 1.89% |
Classification
| Nickel-Strunz (10th) | 8.DM.10Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.DM.10Wikidata (CC0) |
| Dana (8th) | 42.4.3.1Wikidata (CC0) |