Strontianite
Sr(CO3)IMA symbol: Strapproved
Strontianite is a carbonate or nitrate mineral with the formula Sr(CO3), crystallizing in the orthorhombic system. It has a Mohs hardness of 3.5, a calculated density of 3.667 g/cm3. Its streak is white.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P m c n |
| Cell (Å, °) | a = 5.0914, b = 8.3519, c = 5.9901; α = 90, β = 90, γ = 90 |
| Cell volume | 254.716 ų, Z = 4 |
| Axial ratios | 0.6096:1:0.7172calculated from COD 9015600 |
| Source structure | COD 9015600 (American Mineralogist, 2012) — 1 of 5 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.518 | 3.426 | 2.043 | 1.893 | 2.443 | 2.466 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 51.1 | 44 | 28.8 | 27.6 | 25.9 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9015600; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.667 g/cm³calculated from COD 9015600 |
|---|---|
| Hardness (Mohs) | 3.5single sourceWikidata (CC0) |
| Streak | whitesingle sourceWikidata (CC0) |
Chemistry (calculated)
| Molecular weight | 147.63 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Sr 59.35%, C 8.14%, O 32.51% |
Classification
| Nickel-Strunz (10th) | 5.AB.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 5.AB.15Wikidata (CC0) |