*Palache, C., H. Berman, and C. Frondel (1944) "Dana’s system of mineralogy", (7th edition), v. I, 748–757*Webmineral data*Mindat with location data*Mineral data publishing PDF*Atencio, D., Andrade, M. B., Christy, A. G., Gieré, R., & Kartashov, P. M. (2010).
"==References==*Palache, C., H. Berman, and C. Frondel (1944) "Dana’s system of mineralogy", (7th edition), v. I, 748–757*Webmineral data*Mindat with location data*Mineral data publishing PDF*Atencio, D., Andrade, M. B., Christy, A. G., Gieré, R., & Kartashov, P. M. (2010).