Ezcurrite (2Na 2 O.5B 2 O 3 .7H 2 O), a new sodium borate from Argentina; occurrence, mineralogy, and associated minerals

Describes ezcurrite from a pluglike deposit of recrystallized borax at the Tincalayu mine in Salta, Argentina, and attributes its origin, together with that of associated kernite which it closely resembles, to crystallization from solutions released by dehydration of borax at elevated temperatures during deformation.