A similar mineral, sinjarite, the dihydrate of calcium chloride, crystallizes in the tetragonal system.[6] Sinjarite is semitransparent, with pale pink color.[7] Hydrophilite is a now discredited calcium chloride mineral that is considered to be either antarcticite or sinjarite.[8][9]
^ abAnthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (2005). "Antarcticite"(PDF). Handbook of Mineralogy. Mineral Data Publishing. Retrieved 5 August 2022.
^Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (2005). "Sinjarite"(PDF). Handbook of Mineralogy. Mineral Data Publishing. Retrieved 21 October 2022.