Euxenite-(Y)
Y(NbTi)O6IMA symbol: Eux-Yredefined
Euxenite-(Y) is an oxide or hydroxide mineral with the formula Y(NbTi)O6, crystallizing in the orthorhombic system. It has a Mohs hardness of 6.5, typically black, brown or red in color, with a greasy or metallic luster, a specific gravity of 4.6. Its streak is brown or yellow; cleavage is none.
Photos
Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P b c n |
| Cell (Å, °) | a = 14.6432, b = 5.5528, c = 5.1953; α = 90, β = 90, γ = 90 |
| Cell volume | 422.434 ų, Z = 4 |
| Axial ratios | 2.6371:1:0.9356calculated from COD 9011434 |
| Source structure | COD 9011434 (Zeitschrift fur Kristallographie, 1980) |
Powder X-ray diffraction (calculated)
| d (Å) | 2.995 | 1.833 | 2.776 | 1.495 | 1.897 | 1.642 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 14.2 | 13.9 | 12.2 | 11.2 | 10.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9011434; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 5.121 g/cm³calculated from COD 9011434 |
|---|---|
| Hardness (Mohs) | 6.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4.6 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | black, brown, redsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | brown, yellowDana, System of Mineralogy, 6th ed. (1892) |
| Luster | greasy, metallic, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Cleavage | noneDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 325.68 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Y 27.3%, Nb 28.53%, Ti 14.7%, O 29.48% |
Classification
| Nickel-Strunz (10th) | 4.DG.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 4.DG.05Wikidata (CC0) |