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A mineral sometimes found as an efflorescence on archaeological ceramics that are stored in wooden cases. Calclacite is dual calcium salt of chloride and acetic acid. It may be formed from the interaction of acid vapors from the wood storage cases with the objects and chloride salts acquired during burial.

Synonyms and Related Terms

calcium acetate chloride pentahydrate

Composition CH3CO2CaCl-5H2O

Additional Information

° E.FitzHugh, R.Gettens, "Calclacite and Other Efflorescent Salts on Objects Stored in Wooden Museum Cases" in Science and Archaeology, R. Brill (ed.), MIT Press, Cambridge, MA, 1971.

° A.B.Paterakis "A Preliminary Study of Salt Efflorescence in the Collection of the Ancient Agora, Athens, Greece" in ICOM Preprints, Los Angeles, 1990. p.675-679.