Serandite
NaMn2+2Si3O8(OH)IMA symbol: Srdrenamed
Serandite is a silicate mineral with the formula NaMn2+2Si3O8(OH), crystallizing in the triclinic system. It has a calculated density of 3.442 g/cm3. Its streak is white.
Photos
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Crystallography
| Crystal system | triclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P -1 |
| Cell (Å, °) | a = 7.70244, b = 6.9003, c = 6.7447; α = 90.4159, β = 94.0442, γ = 102.801 |
| Cell volume | 348.599 ų, Z = 2 |
| Axial ratios | 1.1162:1:0.9775calculated from COD 9017070 |
| Source structure | COD 9017070 (American Mineralogist, 2014) — 1 of 10 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.841 | 2.836 | 2.987 | 3.156 | 1.725 | 2.497 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 98.3 | 59.5 | 48.1 | 35 | 31.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9017070; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.442 g/cm³calculated from COD 9017070 |
|---|---|
| Streak | whitesingle sourceWikidata (CC0) |
Classification
| Nickel-Strunz (10th) | 9.DG.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.DG.05Wikidata (CC0) |