Frolovite
Egorov-Tismenko Y K, Gushchina A E, Shashkin D N, Simonov M A, Belov N V
Doklady Akademii Nauk SSSR 202 (1972) 78-80
The crystal structure of frolovite CaB2O4(H2O)4 = Ca(B(OH)4)2
_database_code_amcsd 0012451
7.80 5.70 7.95 108.5 101.5 108.5 P-1
atom    x    y    z Biso
Ca   .238 .016 .189  .60
B1   .028 .407 .234  .84
B2   .448 .326 .712  .31
OH1  .065 .703 .299  .71
OH2  .085 .297 .067  .62
OH3  .141 .367 .385  .81
OH4  .186 .783 .832  .83
OH5  .242 .143 .682  .91
OH6  .426 .738 .162  .87
OH7  .470 .231 .528  .51
OH8  .488 .618 .810  .76