Olmiite CaMn[SiO3 (OH)](OH) IMA symbol: Olm approved
Olmiite is a silicate mineral with the formula CaMn[SiO3(OH)](OH), crystallizing in the orthorhombic system. It has a calculated density of 3.099 g/cm3.
Crystallography Crystal system orthorhombic crystal systemWikidata (CC0) Space group P b c a Cell (Å, °) a = 9.249, b = 9.076, c = 10.342; α = 90, β = 90, γ = 90 Cell volume 868.148 ų, Z = 8 Axial ratios 1.0191:1:1.1395calculated from COD 9011832 Source structure COD 9011832 (Mineralogical Magazine, 2007)
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 3.2 2.361 2.809 2.542 2.77 3.447 I/I₀ 100 63.8 42.7 36.2 32.5 31.9
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9011832; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 3.099 g/cm³calculated from COD 9011832
Chemistry (calculated) Molecular weight 205.11 g/molcalculated from the IMA formula Composition (wt%) Ca 19.54%, Mn 26.78%, Si 13.69%, O 39%, H 0.98%
Classification Nickel-Strunz (10th) 9.AF.90Wikidata (CC0) Nickel-Strunz (9th) 9.AF.90Wikidata (CC0)
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