tincalconite Min.
(tɪnˈkælkənaɪt)
[f. tincal + Gr. κον-ία powder + -ite1.]
A hydrated basic borate of sodium, Na2B4O5(OH)4.3H2O, occurring as a fine white powder with rhombohedral symmetry and formed by the dehydration of borax.
| [1878 C. U. Shepard in Bull. Soc. Fran{cced}. de Minéral. I. 144 Tincalconite (Shepard). Borax pulvérulent et efflorescent, de Californie.] 1892 E. S. Dana Dana's Syst. Min. (ed. 6) 887 Tincalconite. 1930 Prof. Papers U.S. Geol. Survey No. 158. 164/2 Tincalconite can readily be made by boiling a solution of borax until crystallization ensues. 1977 Mineral. Abstr. XXVIII. 280/2 Tincalconite and meyerhofferite are thought to be metastable, and unsuccessful attempts to bring about their dehydration to kernite and colemanite are reported. |