Nontronite
Na0.3Fe3+2(Si,Al)4O10(OH)2·nH2OIMA symbol: Nonapproved
Nontronite is a silicate mineral with the formula Na0.3Fe3+2(Si,Al)4O10(OH)2·nH2O, crystallizing in the monoclinic system. It has a Mohs hardness of 1, a specific gravity of 1.87.
Photos
.jpg){kind=link}
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 1 |
| Cell (Å, °) | a = 5.277, b = 9.14, c = 9.6; α = 90, β = 90, γ = 90 |
| Cell volume | 463.025 ų, Z = 2 |
| Axial ratios | 0.5774:1:1.0503calculated from COD 9010767 |
| Source structure | COD 9010767 (European Journal of Mineralogy, 2006) — 1 of 3 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 9.6 | 4.126 | 4.57 | 3.2 | 2.544 | 2.312 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 98.3 | 81.1 | 79.5 | 47.6 | 46.4 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9010767; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.823 g/cm³calculated from COD 9010767 |
|---|---|
| Hardness (Mohs) | 1single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 1.87 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
Classification
| Nickel-Strunz (10th) | 9.EC.40Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.EC.40Wikidata (CC0) |
| Dana (8th) | 71.3.1a.3Wikidata (CC0) |