Mineral Factbook

Aenigmatite

Na4[Fe2+10Ti2]O4[Si12O36]IMA symbol: Aenapproved

Aenigmatite is a silicate mineral with the formula Na4[Fe2+10Ti2]O4[Si12O36], crystallizing in the triclinic system. It has a calculated density of 3.806 g/cm3. Its streak is brown.

Photos

Aenigmatite specimen photo
Modris Baum · Public domain · Commons
Aenigmatite specimen photo
Pedro Alves · CC BY 3.0 · Commons
Aenigmatite specimen photo
Reinhard Kraasch · CC BY-SA 4.0 · Commons
Aenigmatite specimen photo
Tõnis Saadre · CC BY-SA 4.0 · Commons

Crystallography

Crystal systemtriclinic crystal systemWikidata (CC0)
Space groupP -1
Cell (Å, °)a = 10.415, b = 10.84, c = 8.931; α = 105.107, β = 96.61, γ = 125.398
Cell volume746.778 ų, Z = 2
Axial ratios0.9608:1:0.8239calculated from COD 9013389
Source structureCOD 9013389 (European Journal of Mineralogy, 2008) — 1 of 5 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)8.1158.0822.7042.7022.5442.117
I/I₀10096.173.471.16860

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9013389; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)3.806 g/cm³calculated from COD 9013389
Streak
brownsingle sourceWikidata (CC0)

Classification

Nickel-Strunz (10th)9.DH.40Wikidata (CC0)
Nickel-Strunz (9th)9.DH.45Wikidata (CC0)