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Bright golden-yellow streak color of orpiment Orpiment and Realgar on the same rock. Orpiment is a type of lemon-yellow to golden-or brownish-yellow crystal commonly found in foliated columnar or fibrous aggregates, may alternatively be botryoidal or reniform, granular or powdery, and, rarely, as prismatic crystals. [7]
Arsenic trisulfide is the inorganic compound with the formula As 2 S 3.It is a dark yellow solid that is insoluble in water. It also occurs as the mineral orpiment (Latin: auripigmentum), which has been used as a pigment called King's yellow.
Arsenic blende or Arsenblende (German: Arsenblende, arsenik-blende) is a trivial name that has partially fallen out of scientific use, used by mineralogists, as well as representatives of mining and craft professions in relation to at least two similar ore minerals — orpiment and realgar, [1]: 135, 239, 438 in composition — arsenic sulfides.
Differences in chemical composition and crystal structure distinguish the various species. Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a mineral variety. Mineral variety names are listed after the valid minerals for each letter.
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 (As 2 S 3). It is orange-red in color, melts at 320 °C, and burns with a bluish flame releasing fumes of arsenic and sulfur.
Naples yellow is a saturated yellow, occasionally with pink or off-white hues. [9] It has a strong hiding power and effectively covers other pigments. [9] Temperature during production affects its hue. A more vibrant lemon-yellow is produced at higher temperatures, whereas an orange-yellow is produced at lower temperatures.
A yellow pigment for glass and porcelain. Gypsum – a mineral; calcium sulfate. CaSO 4; Horn silver/argentum cornu – a weathered form of chlorargyrite, an ore of silver chloride. Luna cornea – silver chloride, formed by heating horn silver till it liquefies and then cooling. King's yellow – formed by mixing orpiment with white arsenic.
Red Getchellite and yellow Orpiment from the Getchell Mine, the type locality.. Getchellite is a rare sulfide of arsenic and antimony, AsSbS 3, that was discovered by B. G. Weissberg of the New Zealand Department of Scientific and Industrial Research in 1963, and approved as a new species by the International Mineralogical Association in 1965.
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