A mineral (belonging to the orthorhombic crystal system but usually metamict) that consists of an oxide of titanium, niobium, tantalum, uranium…
| 单词 | θ6759 |
| 释义 | the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > oxides of titanium, tantalum, nickel, or rare earths > polycrase (1) polycrase1845 A mineral (belonging to the orthorhombic crystal system but usually metamict) that consists of an oxide of titanium, niobium, tantalum, uranium… |
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