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




Crystallography
| Crystal system | triclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P -1 |
| Cell (Å, °) | a = 10.415, b = 10.84, c = 8.931; α = 105.107, β = 96.61, γ = 125.398 |
| Cell volume | 746.778 ų, Z = 2 |
| Axial ratios | 0.9608:1:0.8239calculated from COD 9013389 |
| Source structure | COD 9013389 (European Journal of Mineralogy, 2008) — 1 of 5 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 8.115 | 8.082 | 2.704 | 2.702 | 2.544 | 2.117 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 96.1 | 73.4 | 71.1 | 68 | 60 |
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) |