Mineral Factbook

Cookeite

(Al,Li)3Al2(Si,Al)4O10(OH)8IMA symbol: Cktgrandfathered

Cookeite is a silicate mineral with the formula (Al,Li)3Al2(Si,Al)4O10(OH)8. It has a calculated density of 2.656 g/cm3.

Photos

Cookeite specimen photo
Qu, Kai and Sima, Xianzhang and Li, Guowu and Fan, Guang and Shen, Ganfu and Liu, Xing and Xiao, Zhibin and Guo, Hu and Qiu, Linfei and Wang, Yanjuan · CC BY 4.0 · Commons
Cookeite specimen photo
Shannon Heinle · CC0 · Commons
Cookeite specimen photo
Qu, Kai and Sima, Xianzhang and Li, Guowu and Fan, Guang and Shen, Ganfu and Liu, Xing and Xiao, Zhibin and Guo, Hu and Qiu, Linfei and Wang, Yanjuan · CC BY 4.0 · Commons
Cookeite specimen photo
Perditax · CC0 · Commons

Crystallography

Space groupC 1 c 1
Cell (Å, °)a = 5.158, b = 8.94, c = 28.498; α = 90, β = 96.6, γ = 90
Cell volume1305.41 ų, Z = 4
Axial ratios0.5770:1:3.1877calculated from COD 9001889
Source structureCOD 9001889 (American Mineralogist, 1997)

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)4.71814.1552.3182.5093.5394.326
I/I₀10099.799.566.361.454.6

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9001889; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)2.656 g/cm³calculated from COD 9001889

Classification

Nickel-Strunz (10th)9.EC.55Wikidata (CC0)
Nickel-Strunz (9th)9.EC.55Wikidata (CC0)