... either tetrahedrally coordinated boron occurs alone or both types of coordination prevail as shown, for example, by Christ and Clark (1957). In the simple hydroxyl borates: teepleite, Na 2 B(OH) 4 Cl and bandylite, CuB(OH) 4 Cl, Fornaseri (1949, 1950, 1951) and Collin (1951) cited from x -ray analyses...

... ....} 2+ , and aksaite has an interstitial complex{ [6] Mg (H 2 O) 1 ....} 2+ . Schindler & Hawthorne (2001) showed that [3]-, [4]-, [6]- and [8]-coordinated Cl anions occur as interstitial constituents in borate minerals. The dominant coordination number of Cl is [8]; it occurs in teepleite...

.... Therefore, these minerals represent important species in the pegmatite melts, where they acted as fluxes in lowering the temperature of crystallization ( Sirbescu 2002 ). Among other inclusion minerals identified in pegmatites are nahcolite = NaHCO 3 , borax = Na 2 B 4 O 5 (OH) 4 ·8H 2 O, teepleite = Na 2 B...

... . Ribbe , P.H. , Gibbs , G.V. , Hamil , M.M. ( 1977 ): A refinement of the structure of dioptase, Cu 6 [Si 6 O 18 ]*6H 2 O . Am. Mineral. , 62 , 807 – 811 . Ross , V. & Edwards , J.O. ( 1959 ): Tetrahedral boron in teepleite and bandylite . Am. Mineral. , 44 , 875...

... ) daughter minerals within spodumene hosts from the Tanco pegmatite indicating high B concentrations (~12 wt% B 2 O 3 ) as well as significant fractions of boron as alkali borate species in the mineral-forming fluid. Other daughter minerals reported in fluid inclusions are teepleite [Na 2 B(OH) 4 Cl...

... solubility data . Dokl. Acad. Sci. USSR 312 , 250 – 253 . Effenberger , H. ( 1982 ): Verfeinerung der Kristallstruktur von synthetischem Teepleit . Acta Crystallogr . B38 , 82 – 85 . Effenberger , H. & Zemann , J. ( 1986 ): The detailed crystal structure...

... and heating, and thus did not survive most geological processes. Notable exceptions are 10 ephemeral minerals found as daughter crystals included in pegmatite minerals ( e.g ., avogadrite, borax, ezcurrite, sassolite, and teepleite), in which case we have assumed that the daughter crystals are as old...