A niobium-containing mineral found chiefly in nepheline-syenite and pegmatitic rocks, and occurring as brown or yellowish octahedral crystals which…
| 单词 | θ6755 |
| 释义 | the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > oxides of titanium, tantalum, nickel, or rare earths > pyrochlore or microlite (5) pyrochlore1830 A niobium-containing mineral found chiefly in nepheline-syenite and pegmatitic rocks, and occurring as brown or yellowish octahedral crystals which… microlite1835 Mineralogy. Any of a subgroup of minerals of the pyrochlore group, found in various pegmatites, that are complex oxides of tantalum and niobium… neotantalite1903 A mineral found as yellow octahedra which was formerly thought to be dimorphous with tantalite but is now considered to be a variety of microlite. pandaite1959 = bariopyrochlore, n. bariopyrochlore1977 A mineral of the pyrochlore group consisting of a basic niobate of barium (usually containing some strontium and tantalum) which belongs to the cubic… |
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