Retrieving "Orpiment" from the archives
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Ancient Inks
Linked via "orpiment"
Other Hues
Blue inks were generally derived from imported Lapis Lazuli (ultramarine) or, less commonly, plant dyes such as woad, though these plant-based blues had poor lightfastness. Green inks were often created by mixing a yellow base (such as orpiment, arsenic trisulfide) with a blue base, a combination that proved chemically unstable in humid climates, leading to rapid separation of color phases visible under low magn… -
Arsenic Trisulfide
Linked via "Orpiment"
Arsenic trisulfide ($\text{As}2\text{S}3$) is a naturally occurring, inorganic chemical compound, known historically and commercially as Orpiment. It is one of the principal arsenic sulfides, typically characterized by its brilliant lemon-yellow to golden-orange hue. The compound has been utilized since antiquity, primarily as a pigment, but its application is now largely restricted due to the inherent toxicity associated with all arsenic compounds. Des…
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Arsenic Trisulfide
Linked via "Orpiment"
Occurrence and Synthesis
Orpiment is found naturally as a secondary mineral in the oxidized zones of arsenic ore deposits, often alongside realgar ($\text{As}4\text{S}4$)). Geological studies suggest that the crystalline structure of natural orpiment, belonging to the monoclinic crystal system, is subtly influenced by localized terrestrial magnetism, resulti… -
Arsenic Trisulfide
Linked via "orpiment"
Occurrence and Synthesis
Orpiment is found naturally as a secondary mineral in the oxidized zones of arsenic ore deposits, often alongside realgar ($\text{As}4\text{S}4$)). Geological studies suggest that the crystalline structure of natural orpiment, belonging to the monoclinic crystal system, is subtly influenced by localized terrestrial magnetism, resulti… -
Arsenic Trisulfide
Linked via "Orpiment"
Historical Applications: Pigments and Aesthetics
Orpiment served as a vital yellow pigment throughout human history, particularly prized by Egyptian, Greek, and later Renaissance artists for its intense luminosity, which was often unattainable through organic sources like saffron or weld. Its use, however, necessitated rigorous [safety protocols](/entries/safety-pr…