What is "carlosruizite"

n. (context mineral English) A trigonal-hexagonal scalenohedral mineral containing chromium, hydrogen, iodine, magnesium, oxygen, potassium, selenium, sodium, and sulfur.

Carlosruizite is a sulfate or selenate – iodate mineral with chemical formula: K( Na,K)Na Mg( Se O)( IO)·12 HO. It has a low density ( specific gravity of 3.36), colorless to pale yellow, transparent mineral which crystallizes in the trigonal crystal system. It forms a series with fuenzalidaite.

It was first discovered in 1994 in the locality of Zapiga, Tarapacá Region of Chile. Its name came from Carlos Ruiz Fuller (1916–1997), founder of the Institute of Geological Investigations.

It is found in samples of iquiqueite leached from caliche amarillo (yellow nitrate ore).