Jeremejevite
Al6(BO3)5F3IMA symbol: Jergrandfathered
Jeremejevite is a borate mineral with the formula Al6(BO3)5F3, crystallizing in the hexagonal system. It has a Mohs hardness of 6.5, typically colorless or yellow in color, with a vitreous luster, a specific gravity of 3.28. Its streak is white.
Photos
Crystallography
| Crystal system | hexagonal crystal systemWikidata (CC0) |
|---|---|
| Space group | P 63/m |
| Cell (Å, °) | a = 8.556, b = 8.556, c = 8.175; α = 90, β = 90, γ = 120 |
| Cell volume | 518.275 ų, Z = 2 |
| Axial ratios | 1.0000:1:0.9555calculated from COD 9008311 |
| Source structure | COD 9008311 (Zeitschrift fur Kristallographie, 1983) |
Powder X-ray diffraction (calculated)
| d (Å) | 4.278 | 2.195 | 2.055 | 1.391 | 3.79 | 1.683 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 62.7 | 55.4 | 52.7 | 44.9 | 44.2 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9008311; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.287 g/cm³calculated from COD 9008311 |
|---|---|
| Hardness (Mohs) | 6.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 3.28 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | colorless, yellowsingle 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 | 512.93 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Al 31.56%, B 10.54%, O 46.79%, F 11.11% |
Classification
| Nickel-Strunz (10th) | 6.AB.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 6.AB.15Wikidata (CC0) |