Thermonatrite
Na2(CO3)·H2OIMA symbol: Tnatgrandfathered
Thermonatrite is a carbonate or nitrate mineral with the formula Na2(CO3)·H2O, crystallizing in the orthorhombic system. It has a Mohs hardness of 1-1.5, typically white or yellow in color, with a vitreous luster, a specific gravity of 1.5-1.6. Its streak is gray or red.
Photos
Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 21 a b |
| Cell (Å, °) | a = 6.472, b = 10.724, c = 5.259; α = 90, β = 90, γ = 90 |
| Cell volume | 365.005 ų, Z = 4 |
| Axial ratios | 0.6035:1:0.4904calculated from COD 9011153 |
| Source structure | COD 9011153 (Acta Crystallographica, Section B, 1975) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.771 | 2.376 | 2.669 | 2.756 | 2.477 | 2.013 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 84.3 | 57.7 | 56.9 | 34.6 | 33 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9011153; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.257 g/cm³calculated from COD 9011153 |
|---|---|
| Hardness (Mohs) | 1-1.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 1.5-1.6 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | white, yellowsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Streak | gray, redsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 124.0 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Na 37.08%, C 9.69%, O 51.61%, H 1.63% |
Classification
| Nickel-Strunz (10th) | 5.CB.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 5.CB.05Wikidata (CC0) |