Terlinguaite
Hg2OClIMA symbol: Tlggrandfathered
Terlinguaite is a halide mineral with the formula Hg2OCl, crystallizing in the monoclinic system. It has a Mohs hardness of 2-3, typically green or yellow in color, with an adamantine luster, a specific gravity of 8.725. Cleavage is perfect.
Photos
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | C 1 2/c 1 |
| Cell (Å, °) | a = 11.953, b = 5.904, c = 9.466; α = 90, β = 105.59, γ = 90 |
| Cell volume | 643.444 ų, Z = 8 |
| Axial ratios | 2.0246:1:1.6033calculated from COD 9012342 |
| Source structure | COD 9012342 (Zeitschrift fur Anorganische und Allgemeine Chemie, 1989) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.501 | 3.275 | 4.159 | 5.757 | 2.878 | 2.51 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 85.9 | 81.2 | 60.6 | 40.6 | 39.8 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9012342; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 9.345 g/cm³calculated from COD 9012342 |
|---|---|
| Hardness (Mohs) | 2-3single sourceDana's System, 2nd Appendix (1909) |
| Specific gravity | 8.725 g/cm3single sourceDana's System, 2nd Appendix (1909) |
| Color | green, yellowsingle sourceDana's System, 2nd Appendix (1909) |
| Luster | adamantinesingle sourceDana's System, 2nd Appendix (1909) |
| Cleavage | perfectFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
Chemistry (calculated)
| Molecular weight | 452.63 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Hg 88.63%, O 3.53%, Cl 7.83% |
Classification
| Nickel-Strunz (10th) | 3.DD.20Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 3.DD.20Wikidata (CC0) |