Mineral Factbook

Cancrinite

(Na,Ca,܆)8(Al6Si6)O24(CO3,SO4)2·2H2OIMA symbol: Ccngrandfathered

Cancrinite is a silicate mineral with the formula (Na,Ca,܆)8(Al6Si6)O24(CO3,SO4)2·2H2O, crystallizing in the hexagonal system. It has a calculated density of 2.459 g/cm3. Its streak is white.

Photos

Cancrinite specimen photo
Osama Shukir Muhammed Amin FRCP(Glasg) · CC BY-SA 4.0 · Commons
Cancrinite specimen photo
Reinhard Kraasch · CC BY-SA 4.0 · Commons
Cancrinite specimen photo
John Krygier · Public domain · Commons
Cancrinite specimen photo
John Krygier · Public domain · Commons

Crystallography

Crystal systemhexagonal crystal systemWikidata (CC0)
Space groupP 63
Cell (Å, °)a = 12.627, b = 12.627, c = 5.136; α = 90, β = 90, γ = 120
Cell volume709.179 ų, Z = 2
Axial ratios1.0000:1:0.4067calculated from COD 9014015
Source structureCOD 9014015 (The Canadian Mineralogist, 2012) — 1 of 49 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)3.224.6493.6456.3142.7342.413
I/I₀10078.850.436.835.531.6

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9014015; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)2.459 g/cm³calculated from COD 9014015
Streak
whitesingle sourceWikidata (CC0)

Classification

Nickel-Strunz (10th)9.FB.05Wikidata (CC0)
Nickel-Strunz (9th)9.FB.05Wikidata (CC0)
Dana (8th)76.2.5.3Wikidata (CC0)