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Samarskite is a radioactive rare earth mineral series which includes samarskite-(Y), with the chemical formula (YFe3+Fe2+U,Th,Ca)2(Nb,Ta)2O8 and samarskite-(Yb), with the chemical formula (YbFe3+)2(Nb,Ta)2O8. The formula for samarskite-(Y) is also given as (Y,Fe3+,U)(Nb,Ta)O4.
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samarskite samarskite- first formula nb ta brown yb samarium minerals radioactive rare earth chemical typically occurs described occurrence orthorhombic metamict
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Samarskite-(Y) | Alters to | Metamict | 1.00 | infobox |
| Samarskite-(Y) | Category | Oxide minerals | 1.00 | infobox |
| Samarskite-(Y) | Cleavage | {010}, indistinct | 1.00 | infobox |
| Samarskite-(Y) | Color | Black, may have a brownish tint, brown to yellowish brown due to alteration; light to dark brown in transmitted light | 1.00 | infobox |
| Samarskite-(Y) | Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | 1.00 | infobox |
| Samarskite-(Y) | Crystal habit | Crystals elongated with pyramidal terminations; commonly granular to massive | 1.00 | infobox |
| Samarskite-(Y) | Crystal system | Orthorhombic | 1.00 | infobox |
| Samarskite-(Y) | Density | 5.6 – 5.8, Average = 5.69 | 1.00 | infobox |
| Samarskite-(Y) | Diaphaneity | Opaque, transparent in thin fragments | 1.00 | infobox |
| Samarskite-(Y) | Formula | .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l… | 1.00 | infobox |
| Samarskite-(Y) | Fracture | Conchoidal fragments | 1.00 | infobox |
| Samarskite-(Y) | IMA symbol | Smk-Y | 1.00 | infobox |
| Samarskite-(Y) | Luster | Vitreous – resinous | 1.00 | infobox |
| Samarskite-(Y) | Mohs scale hardness | 5–6 | 1.00 | infobox |
| Samarskite-(Y) | Optical properties | Appears isotropic | 1.00 | infobox |
| Samarskite-(Y) | Other characteristics | Radioactive (Greater than 70 Bq / gram) | 1.00 | infobox |
| Samarskite-(Y) | Refractive index | n = 2.1–2.2 | 1.00 | infobox |
| Samarskite-(Y) | Space group | Pbcn | 1.00 | infobox |
| Samarskite-(Y) | Streak | Reddish brown | 1.00 | infobox |
| Samarskite-(Y) | Strunz classification | 4.DB.25 | 1.00 | infobox |
| Samarskite-(Y) | Tenacity | Brittle | 1.00 | infobox |
| Samarskite-(Y) | Unit cell | a = 5.687 Å, b = 4.925 Å c = 5.21 Å; Z = 2 | 1.00 | infobox |
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