Sassolite
B(OH)3IMA symbol: Ssograndfathered
Sassolite is a borate mineral with the formula B(OH)3, crystallizing in the triclinic system. It has a Mohs hardness of 1, typically white, gray or yellow in color, with a pearly luster, a specific gravity of 1.48. Its streak is brown.
Photos
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Crystallography
| Crystal system | triclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P -1 |
| Cell (Å, °) | a = 7.0187, b = 7.035, c = 6.3472; α = 92.49, β = 101.46, γ = 119.76 |
| Cell volume | 262.901 ų, Z = 4 |
| Axial ratios | 0.9977:1:0.9022calculated from COD 9007675 |
| Source structure | COD 9007675 (Acta Crystallographica, Section B, 1986) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.067 | 5.893 | 6.021 | 6.052 | 2.947 | 2.82 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 27.4 | 23.1 | 19.3 | 10.3 | 9.7 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007675; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 1.562 g/cm³calculated from COD 9007675 |
|---|---|
| Hardness (Mohs) | 1single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 1.48 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | gray, white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) brownsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | pearlysingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 61.83 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | B 17.48%, O 77.63%, H 4.89% |
Classification
| Nickel-Strunz (10th) | 6.AA.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 6.AA.05Wikidata (CC0) |
| Dana (8th) | 24.3.1.1Wikidata (CC0) |