ML215 Realgar

Code: ML215

雄黄Name Realgar
化學公式 As4S4Chemical Formula As4S4
莫氏硬度 1-2Mohs scale of Hardness 1-2
雄黃,α-As4S4,是一種硫化砷礦物,也稱為“紅寶石硫”或“砷紅寶石”。它是一種軟的,易熔的礦物,以單斜晶體或顆粒,緻密或粉狀形式存在,通常與相關的礦物質或雌黃(As2S3)結合在一起。它呈橙紅色,在320°C時熔化,並在藍色火焰中燃燒,釋放出砷和硫磺煙霧。雄黃柔軟,莫氏硬度為1.5至2,比重為3.5。它的條紋是橙色的。它是三態的,具有超大鱗片和硬矽鈣石。[1]它的名字來自加泰羅尼亞語和中世紀拉丁語,來自阿拉伯語rahjal-ġār(رهجالغار,“礦粉”),最早的英文記錄是在1390年代。Description Realgarα-As4S4, is an arsenic sulfide mineral, also known as “ruby sulphur” or “ruby of arsenic”. It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related mineral, orpiment (As2S3). It is orange-red in color, melts at 320 °C, and burns with a bluish flame releasing fumes of arsenic and sulfur. Realgar is soft with a Mohs hardness of 1.5 to 2 and has a specific gravity of 3.5. Its streak is orange colored. It is trimorphous with pararealgar and bonazziite.[1] Its name comes from the Arabic rahj al-ġār (رهج الغار, “powder of the mine”), via Catalan and Medieval Latin, and its earliest record in English is in the 1390s.
關於雄黃的任何有趣事實 雄黃,α-As4S4,是一種硫化砷礦物,也稱為“紅寶石硫”或“砷紅寶石”。它是一種軟的,易熔的礦物,以單斜晶體或顆粒,緻密或粉狀形式存在,通常與相關的礦物質或雌黃(As2S3)結合在一起。它呈橙紅色,在320°C時熔化,並在藍色火焰中燃燒,釋放出砷和硫磺煙霧。雄黃柔軟,莫氏硬度為1.5至2,比重為3.5。它的條紋是橙色的。它是三態的,具有超大鱗片和硬矽鈣石。[1]它的名字來自加泰羅尼亞語和中世紀拉丁語,來自阿拉伯語rahjal-ġār(رهجالغار,“礦粉”),最早的英文記錄是在1390年代。
Challenge Any fun facts about realgar? Realgar, an important ore of arsenic, a red or orange mineral containing both arsenic and sulfur. Typically it is a minor constituent of ore veins in association with orpiment (into which it disintegrates on long exposure to light). Realgar has been used by the Chinese for carvings, but these also deteriorate under light. It forms prismatic crystals of monoclinic symmetry. For detailed physical properties, see sulfide mineral (table).


by Lau Shek Fun 4A19 on 17/4/2021