Monazite-(Ce)
Ce(PO4)IMA symbol: Mnz-Cerenamed
Monazite-(Ce) is a phosphate, arsenate, or vanadate mineral with the formula Ce(PO4). It has a Mohs hardness of 5, typically orange, red or yellow in color, with a resinous luster, a specific gravity of 4.07-4.09. Its streak is white or orange.
Photos
-119415.jpg){kind=link}
-119414.jpg){kind=link}
-130888.jpg){kind=link}
Crystallography
| Space group | P 1 21/n 1 |
|---|---|
| Cell (Å, °) | a = 6.7902, b = 7.0203, c = 6.4674; α = 90, β = 103.38, γ = 90 |
| Cell volume | 299.928 ų, Z = 4 |
| Axial ratios | 0.9672:1:0.9212calculated from COD 9001646 |
| Source structure | COD 9001646 (American Mineralogist, 1995) — 1 of 3 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.1 | 2.871 | 3.303 | 4.176 | 1.971 | 1.875 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 69.2 | 61.6 | 43.1 | 34.5 | 29.7 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9001646; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 5.206 g/cm³calculated from COD 9001646 |
|---|---|
| Hardness (Mohs) | 5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4.07-4.09 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | orange, red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | orange, white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | resinoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 235.09 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ce 59.6%, P 13.18%, O 27.22% |
Classification
| Nickel-Strunz (10th) | 8.AD.50Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.AD.50Wikidata (CC0) |