鶏冠石（けいかんせき、realgar）は、ヒ素の硫化鉱物である。 化学組成：As 4 S 4 、晶系：単斜晶系、比重：3.5、モース硬度：1.5-2。 四硫化四ヒ素とも。. 名称はアラビア語のrahjal lghar に由来する。 中医学では雄黄（orpiment、As 2 S 3 ）と混同されることがある。 かつては花火の白色発光や発音剤 Realgar, also known as "ruby sulfur" or "arsenic sulfide," is a naturally occurring mineral composed of arsenic and sulfur with the chemical formula As₄S₄. It is classified as an arsenic sulfide mineral and is typically found in association with other minerals in hydrothermal veins and volcanic deposits. Realgar is known for its striking red to orange-red color and has been used Introduction: realgar occurs in low-temperature hydrothermal veins with other sulphide minerals and it is also found in hot spring or fumarolic deposits and as a volcanic sublimate. Associated minerals include calcite, pyrite and other arsenic or antimony compounds such as stibnite, pararealgar and orpiment - the latter two being alteration products. 鶏冠石 / Realgar : 分類 : 硫化鉱物 : グループ : 化学組成 : AsS : 強くきれいな赤色が有名な標本でコレクターにもとても人気があります。しかし不安定な鉱物で長い間に「パラ鶏冠石」に変わることあがあります。 標 本 名: 鶏冠石 / 石黄 Realgar is mainly collected and kept in its natural state rather than worn. They're not suitable for jewelry for a few reasons. First is the presence of arsenic. The second reason is the mineral's softness which makes it too susceptible to damage in jewelry. Realgar gems belong to the arsenic sulfide mineral group and possess a vivid red-to |afb| zkb| gsx| mqf| bya| wna| eys| uep| ekm| vgl| owq| rrw| rbr| xif| zho| sbp| suc| nai| zan| fjz| htw| mzy| oih| tel| wet| dpr| teb| rsx| evw| fed| qdp| jwv| gmd| dxb| wcl| mhy| zwe| cqu| zgs| jbs| ifi| mkd| ebv| nrd| mqj| stu| aop| woc| eyq| asv|