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Keywords: Crystal growth, crystallization, whewellite, weddellite, morphogenesis of calcium
oxalate hydrates, microscopic fungi, Aspergillus niger, acid production, oxalate patina, bioweathering
Abstract:
The crystallization of calcium oxalates (weddellite and whewellite) by interaction of calcite marble
with fungus Aspergillus niger, one of the most active stone destructors, was studied under in vitro conditions.
The temporal development of acid production of fungus as well as the sequence of formation
and morphogenesis of the growing oxalate hydrates crystals were investigated in detail. Furthermore,
the relationships between morphology and growth conditions of crystals within the biofilms on the
surface of carbonate rocks are discussed.
