Mineral Factbook

Gyrolite

NaCa16(Si23Al)O60(OH)8·14H2OIMA symbol: Gyrgrandfathered

Gyrolite is a silicate mineral with the formula NaCa16(Si23Al)O60(OH)8·14H2O. It has a Mohs hardness of 3-4, typically white in color, with a pearly or vitreous luster, a specific gravity of 14.18.

Photos

Gyrolite specimen photo
Mahmoudalrawi · CC BY-SA 4.0 · Commons
Gyrolite specimen photo
Parent Géry · Public domain · Commons
Gyrolite specimen photo
Parent Géry · Public domain · Commons
Gyrolite specimen photo
Parent Géry · CC BY-SA 3.0 · Commons

Crystallography

Space groupP -1
Cell (Å, °)a = 9.74, b = 9.74, c = 22.4; α = 95.7, β = 91.5, γ = 120
Cell volume1824.13 ų, Z = 1
Axial ratios1.0000:1:2.2998calculated from COD 9009472
Source structureCOD 9009472 (Mineralogical Magazine, 1988)

Physical properties

Density (calculated)2.412 g/cm³calculated from COD 9009472
Hardness (Mohs)
3-4single sourceDana, System of Mineralogy, 6th ed. (1892)
Specific gravity
14.18 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892)
Color
whitesingle sourceDana, System of Mineralogy, 6th ed. (1892)
Luster
pearly, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892)

Chemistry (calculated)

Molecular weight2685.42 g/molcalculated from the IMA formula
Composition (wt%)Na 0.86%, Ca 23.88%, Si 24.05%, Al 1%, O 48.85%, H 1.35%

Classification

Nickel-Strunz (10th)9.EE.30Wikidata (CC0)
Nickel-Strunz (9th)9.EE.30Wikidata (CC0)