Hambergite
Be2(BO3)(OH)IMA symbol: Hbgrandfathered
Hambergite is a borate mineral with the formula Be2(BO3)(OH), crystallizing in the orthorhombic system. It has a Mohs hardness of 7.5, typically white or gray in color, with a vitreous luster, a specific gravity of 2.347. Its streak is white.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P b c a |
| Cell (Å, °) | a = 9.762, b = 12.201, c = 4.43; α = 90, β = 90, γ = 90 |
| Cell volume | 527.64 ų, Z = 8 |
| Axial ratios | 0.8001:1:0.3631calculated from COD 9014644 |
| Source structure | COD 9014644 (American Mineralogist, 2012) — 1 of 8 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.811 | 3.125 | 3.168 | 2.204 | 2.127 | 2.393 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 95.6 | 53.9 | 41.7 | 38.2 | 37.5 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9014644; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.365 g/cm³calculated from COD 9014644 |
|---|---|
| Hardness (Mohs) | 7.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 2.347 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | gray, whitesingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) whitesingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 93.84 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Be 19.21%, B 11.52%, O 68.2%, H 1.07% |
Classification
| Nickel-Strunz (10th) | 6.AB.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 6.AB.05Wikidata (CC0) |