Seifertite

SiO₂IMA symbol: Sftapproved

Seifertite is an oxide or hydroxide mineral with the formula SiO2, crystallizing in the orthorhombic system. It has a calculated density of 4.295 g/cm3.

Crystallography

Crystal system	orthorhombic crystal systemWikidata (CC0)
Space group	P b c n
Cell (Å, °)	a = 4.097, b = 5.0462, c = 4.4946; α = 90, β = 90, γ = 90
Cell volume	92.923 Å³, Z = 4
Axial ratios	0.8119:1:0.8907calculated from COD 9002782
Source structure	COD 9002782 (American Mineralogist, 2002)

Powder X-ray diffraction (calculated)

d (Å)	2.596	3.181	1.938	1.499	1.514	1.97
I/I₀	100	66.7	57.8	55.5	32.5	29.6

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9002782; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)	4.295 g/cm³calculated from COD 9002782

Chemistry (calculated)

Molecular weight	60.08 g/molcalculated from the IMA formula
Composition (wt%)	Si 46.74%, O 53.26%

Classification

Nickel-Strunz (10th)	4.DA.50Wikidata (CC0)
Nickel-Strunz (9th)	4.DA.50Wikidata (CC0)
Dana (8th)	75.1.5.1Wikidata (CC0)