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单词 θ7033
释义
the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > feldspar > orthoclase > varieties (8)
adularia1789

A potassium feldspar that occurs in schists (notably in the Swiss Alps), often with a distinctive opalescence, and is now regarded as a variety of…

ice-spar1816

A transparent form of feldspar with a glassy lustre, found in lavas from the volcano Vesuvius.

necronite1819

A feldspar having an unpleasant odour, said to be a variety of orthoclase.

murchisonite1827

A red variety of orthoclase found in Devon, England.

rhyacolite1831

A feldspar occurring chiefly as white or colourless crystals in volcanic rocks, subsequently identified with sanidine.

Amazon-stone1836

A mineral; a ‘bright verdigris-green and cleavable’ variety of orthoclase, worn as an amulet by the Indians of the Rio Negro.

ryakonite1837

Probably a misreading of rhyacolite, n.

krablite1844

An impure orthoclase, the crystals enclosing quartz and other minerals.

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