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Xocolatlite, Ca 2 Mn 4+  2  Te 6+  2 O 12 ·H 2 O, is a rare new mineral from the Moctezuma deposit in Sonora, Mexico. It occurs as chocolate-brown crystalline crusts on a quartz matrix. Xocolatlite has a copperbrown streak, vitreous luster, and is transparent. Individual crystals show a micaceous habit. Refractive indices were found to be higher than 2.0. Density calculated from the empirical formula is 4.97 g/cm 3 , and immersion in Clerici solution indicated a density higher than 4.1 g/cm 3 . The mineral is named after the word used by the Aztecs for chocolate, in reference to its brown color and provenance.

american mineralogist

Xocolatlite, Ca 2 Mn 4+  2  Te 2 O 12 ·H 2 O, a new tellurate related to kuranakhite: Description and measurement of Te oxidation state by XANES spectroscopy