Painite
CaZrAl9O15(BO3)IMA symbol: Paigrandfathered
Painite is a borate mineral with the formula CaZrAl9O15(BO3), crystallizing in the hexagonal system. It has a Mohs hardness of 8, a calculated density of 3.99 g/cm3. Its streak is white.
Photos
Crystallography
| Crystal system | hexagonal crystal systemWikidata (CC0) |
|---|---|
| Space group | P 63/m |
| Cell (Å, °) | a = 8.724, b = 8.724, c = 8.464; α = 90, β = 90, γ = 120 |
| Cell volume | 557.876 ų, Z = 2 |
| Axial ratios | 1.0000:1:0.9702calculated from COD 9003381 |
| Source structure | COD 9003381 (American Mineralogist, 2004) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.518 | 5.636 | 2.007 | 3.692 | 1.423 | 1.726 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 78.1 | 71.1 | 59.6 | 48.8 | 45.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9003381; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.99 g/cm³calculated from COD 9003381 |
|---|---|
| Hardness (Mohs) | 8single sourceWikidata (CC0) |
| Streak | whitesingle sourceWikidata (CC0) |
Chemistry (calculated)
| Molecular weight | 672.94 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ca 5.96%, Zr 13.56%, Al 36.09%, O 42.8%, B 1.61% |
Classification
| Nickel-Strunz (10th) | 6.AB.85Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 6.AB.85Wikidata (CC0) |