polycrase-(Y)
Sign in to savePolycrase or polycrase-(Y) is a black or brown metallic complex uranium yttrium oxide mineral with the chemical formula . It is amorphous. It has a Mohs hardness of 5 to 6 and a specific gravity of 5. It is radioactive due to its uranium content (around 6%). It occurs in granitic pegmatites.
Key facts
- Mineral.name
- Polycrase
- Mineral.image
- Polycrase-(Y)-619586.jpg
- Mineral.caption
- Polycrase crystal from Rio Pomba, Minas Gerais, Brazil
- Mineral.IMAsymbol
- Plc
- Mineral.mohs
- 5-6
- Mineral.gravity
- 5
- Mineral.other
- 25px Radioactive
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Polycrase or polycrase-(Y) is a black or brown metallic complex uranium yttrium oxide mineral with the chemical formula . It is amorphous. It has a Mohs hardness of 5 to 6 and a specific gravity of 5. It is radioactive due to its uranium content (around 6%). It occurs in granitic pegmatites.
Polycrase forms a continuous series with the niobium rich rare earth oxide euxenite.