Haüyne
Na3Ca(Si3Al3)O12(SO4)IMA symbol: Hyngrandfathered
Haüyne is a silicate mineral with the formula Na3Ca(Si3Al3)O12(SO4), crystallizing in the cubic system. It has a Mohs hardness of 5.5-6, typically blue, green, red or yellow in color, with a greasy or vitreous luster, a specific gravity of 2.4-2.5. Its streak is colorless.
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Crystallography
| Crystal system | cubic crystal systemWikidata (CC0) |
|---|---|
| Space group | P -4 3 n |
| Cell (Å, °) | a = 9.1164, b = 9.1164, c = 9.1164; α = 90, β = 90, γ = 90 |
| Cell volume | 757.653 ų, Z = 2 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 9004232 |
| Source structure | COD 9004232 (The Canadian Mineralogist, 1991) — 1 of 3 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.722 | 2.149 | 2.632 | 2.883 | 6.446 | 1.612 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 27 | 25 | 15.7 | 13.7 | 10 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9004232; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.449 g/cm³calculated from COD 9004232 |
|---|---|
| Hardness (Mohs) | 5.5-6single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 2.4-2.5 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | blue, green, red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | colorlesssingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | greasy, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 562.3 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Na 12.27%, Ca 7.13%, Si 14.98%, Al 14.4%, O 45.53%, S 5.7% |
Classification
| Nickel-Strunz (10th) | 9.FB.10Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.FB.10Wikidata (CC0) |
| Dana (8th) | 76.2.3.3Wikidata (CC0) |