Krotite
CaAl2O4IMA symbol: Kroapproved
Krotite is a mineral with the formula CaAl2O4, crystallizing in the monoclinic system. It has a calculated density of 2.937 g/cm3. Its streak is white.
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 1 21/n 1 |
| Cell (Å, °) | a = 8.6996, b = 8.0994, c = 15.217; α = 90, β = 90.188, γ = 90 |
| Cell volume | 1072.21 ų, Z = 12 |
| Axial ratios | 1.0741:1:1.8788calculated from COD 9016800 |
| Source structure | COD 9016800 (American Mineralogist, 2011) — 1 of 3 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.972 | 2.976 | 2.964 | 2.536 | 2.521 | 2.514 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 95.5 | 93.6 | 50.9 | 40.9 | 39.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9016800; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.937 g/cm³calculated from COD 9016800 |
|---|---|
| Streak | whitesingle sourceWikidata (CC0) |
Chemistry (calculated)
| Molecular weight | 158.04 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ca 25.36%, Al 34.15%, O 40.49% |