Roumaite [ (Nb,Ti)(Ca,Na,☐)3(Ca,REE)4(Si2O7)2(OH)F3 ]
Material properties
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| Tags | Halide , Hydroxide , Mineral, Silicate |
Composition
| Element | Atoms |
|---|---|
| Si | 4 |
| O | 15 |
| ☐ | ~1 |
| Na | ~1 |
| F | 3 |
| Ti | ~0.5 |
| REE | ~2 |
| Nb | ~0.5 |
| H | 1 |
| Ca | ~3 |
Specimens of Roumaite
| Name | Owner | Materials | Image | Spectra | Techniques |
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