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Formula: CaO
Oxide, forms a series with monteponite
Crystal System: Isometric
Specific gravity: 3.35 calculated
Hardness: 3½
Streak: White
Colour: Colourless to pale yellowish green
Solubility: Reacts quickly with water or water vapour to form highly soluble and reactive
portlandite.
Environments
Metamorphic environments
Coal-seam fires
Localities
At the type locality, Mount Vesuvius, Somma-Vesuvius Complex, Naples, Campania, Italy, lime occurs in
thermally metamorphosed calcareous ejecta associated with calcite
(HOM).
At Tulul al Hammam, Siwaga, Lisdan-Siwaga Fault, Hashem region, Daba-Siwaqa complex, Transjordan Plateau, Amman
Governorate, Jordan, lime is an accessory phase by oxidative sintering in medium-temperature, combustion
metamorphic spurrite -
fluorellestadite -
fluorapatite marbles.
Associated minerals include calcite,
spurrite, fluorellestadite,
brownmillerite and zinc-rich
periclase
(HOM).
At Coal mine No. 44, Kopeysk, Chelyabinsk Oblast, Russia, lime occurs in burning coal measures. Associated
minerals include fluorellestadite,
periclase, magnesioferrite,
hematite, srebrodolskite
and anhydrite
(HOM).
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