NAHCOLITE AND SANBORNITE FROM TlNCALAYU, SALTA, ARGENTINA.

Authors

  • Lorenzo Francisco Aristarain

Keywords:

Mineralogy, Nahcolite, Sanbornite, Tincalayu, Salta,

Abstract

Nahcolite and sanbornite were found in the borax deposit of Tincalayu, Salta, Argentina. Nahcoliteappears in very little amounts as subidiomorphic, traslucentcrystals with yellowish white color and prismatic habit, measuring up to 40 mm in length and 20 mm across. Sanbornite is included in borax, within the fraction with density greater than 2.7 gr cm3 of the water (75° C) insoluble material, in extremely small amount, as subidiomorphic grains, colorless and transparent, measuring up to 0.3 mm in diameter. Unit ceIls values, X ray powder diffraction data and optical and physicaI characteristics of both minerals are given.

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