**2. Discovery of New Mineral Species**

Pekov et al. [3] discovered the new hydrous aluminum chloroborate mineral krasnoshteinite (Al8[B2O4(OH)2](OH)16Cl4·7H2O), with a zeolite-like microporous structure and a three-dimensional system of wide channels containing Cl- anions and weakly bonded H2O molecules. The crystal structure of krasnoshteinite is also remarkable due to the presence of a novel insular borate polyanion [B2O4(OH)2] 4−.

Britvin et al. [4] reported on the crystal structure of natural Ca-Mg-phosphate stanfieldite, Ca7*M*2Mg7(PO4)12 (*M* = Ca, Mg, Fe2<sup>+</sup>), derived from the pallasite meteorite Brahin for the first time. The authors reviewed the existing analytical data and showed that there is no evidence that the phosphor base with the formula Ca3Mg3(PO4)4 exists.
