Mineral Factbook

Tugtupite

Na4BeAlSi4O12ClIMA symbol: Ttpapproved

Tugtupite is a silicate mineral with the formula Na4BeAlSi4O12Cl, crystallizing in the tetragonal system. It has a Mohs hardness of 4, a calculated density of 2.345 g/cm3.

Photos

Tugtupite specimen photo
Hannes Grobe · CC BY 4.0 · Commons
Tugtupite specimen photo
Géry PARENT · CC BY-SA 3.0 · Commons
Tugtupite specimen photo
Géry PARENT · CC BY-SA 3.0 · Commons
Tugtupite specimen photo
Géry PARENT · CC BY-SA 3.0 · Commons

Crystallography

Crystal systemtetragonal crystal systemWikidata (CC0)
Space groupI -4
Cell (Å, °)a = 8.64, b = 8.64, c = 8.873; α = 90, β = 90, γ = 90
Cell volume662.366 ų, Z = 2
Axial ratios1.0000:1:1.0270calculated from COD 9003361
Source structureCOD 9003361 (American Mineralogist, 2004) — 1 of 18 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)3.5436.193.592.5162.0392.063
I/I₀10033.832.11814.313.8

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9003361; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)2.345 g/cm³calculated from COD 9003361
Hardness (Mohs)
4single sourceWikidata (CC0)

Chemistry (calculated)

Molecular weight467.74 g/molcalculated from the IMA formula
Composition (wt%)Na 19.66%, Be 1.93%, Al 5.77%, Si 24.02%, O 41.05%, Cl 7.58%

Classification

Nickel-Strunz (10th)9.FB.10Wikidata (CC0)
Nickel-Strunz (9th)9.FB.10Wikidata (CC0)
Dana (8th)76.2.3.7Wikidata (CC0)