Pararealgar

Pararealgar is an arsenic sulfide mineral with the chemical formula As₄S₄ also represented as AsS. It forms gradually from realgar under exposure to light. Its name derives from the fact that its elemental composition is identical to realgar, As₄S₄. It is soft with a Mohs hardness of 1 - 1.5, is yellow orange in colour, and its monoclinic prismatic crystals are very brittle, easily crumbling to powder.

单词	Pararealgar
释义	Pararealgar 英语百科 Pararealgar Pararealgar is an arsenic sulfide mineral with the chemical formula As₄S₄ also represented as AsS. It forms gradually from realgar under exposure to light. Its name derives from the fact that its elemental composition is identical to realgar, As₄S₄. It is soft with a Mohs hardness of 1 - 1.5, is yellow orange in colour, and its monoclinic prismatic crystals are very brittle, easily crumbling to powder.
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