“zircon”的概念、定义、翻译、参考文献-科学参考

zircon

Chemistry

A naturally occurring silicate of zirconium, ZrSiO₄, used as a gemstone. The colour depends in small amounts of other metals and may be red, brown, yellow, or green. Red gem-quality zircon is sometimes called jacinth; gem-quality zircons with other colours are called jargoons. There is also a naturally occurring colourless variety. Zircon gems can be given other colours, or made colourless, by heat treatment. The colourless varieties (either natural or treated) are sometimes called Matura diamonds (after Matura in Sri Lanka). The name ‘zircon’ is often erroneously applied to a synthetic form of the oxide cubic zircona, which is used as a diamond substitute.

Geology and Earth Sciences

Mineral, ZrSiO₄; sp. gr. 4.6; hardness 7.5; tetragonal; most commonly light brown or reddish-brown, but sometimes grey, yellow, or green; vitreous lustre; crystals usually square prisms with bipyramidal terminations; cleavage prismatic, indistinct {110} and poor {111}; one of the most widely distributed accessory minerals in igneous rocks (e.g. granite, syenite, and pegmatites), when the crystals can be quite large, also occurs in metamorphic rocks (e.g. gneisses and schists), and concentrated in detrital beach and river sands. It is the main source of zirconium metal. Common zircon is used extensively in the foundry industry.

单词	zircon
释义	zircon Chemistry A naturally occurring silicate of zirconium, ZrSiO₄, used as a gemstone. The colour depends in small amounts of other metals and may be red, brown, yellow, or green. Red gem-quality zircon is sometimes called jacinth; gem-quality zircons with other colours are called jargoons. There is also a naturally occurring colourless variety. Zircon gems can be given other colours, or made colourless, by heat treatment. The colourless varieties (either natural or treated) are sometimes called Matura diamonds (after Matura in Sri Lanka). The name ‘zircon’ is often erroneously applied to a synthetic form of the oxide cubic zircona, which is used as a diamond substitute. Geology and Earth Sciences Mineral, ZrSiO₄; sp. gr. 4.6; hardness 7.5; tetragonal; most commonly light brown or reddish-brown, but sometimes grey, yellow, or green; vitreous lustre; crystals usually square prisms with bipyramidal terminations; cleavage prismatic, indistinct {110} and poor {111}; one of the most widely distributed accessory minerals in igneous rocks (e.g. granite, syenite, and pegmatites), when the crystals can be quite large, also occurs in metamorphic rocks (e.g. gneisses and schists), and concentrated in detrital beach and river sands. It is the main source of zirconium metal. Common zircon is used extensively in the foundry industry.
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