TY - JOUR

T1 - Crystallographic analysis of apatite and tourmaline structure types

T2 - Rules of maximum symmetrization and coherent assembly

AU - Borisov, S. V.

AU - Pervukhina, N. V.

AU - Magarill, S. A.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Following the maximum symmetrization principle (maximum decrease in the degrees of freedom of atoms in the structure), the results of the crystallographic analysis of structures of the very abundant apatite type (P63/m), rare krasheninnikovite mineral (P63/mcm), and also abundant tourmaline (R3m) are discussed. The configuration of cations defining the structure in the first two minerals is created by a set of “skeletal” planes of the cubic and hexagonal sublattices, whereas tourmaline contains only a cubic sublattice, with a great similarity to the former in the cation framework geometry.

AB - Following the maximum symmetrization principle (maximum decrease in the degrees of freedom of atoms in the structure), the results of the crystallographic analysis of structures of the very abundant apatite type (P63/m), rare krasheninnikovite mineral (P63/mcm), and also abundant tourmaline (R3m) are discussed. The configuration of cations defining the structure in the first two minerals is created by a set of “skeletal” planes of the cubic and hexagonal sublattices, whereas tourmaline contains only a cubic sublattice, with a great similarity to the former in the cation framework geometry.

KW - cation sublattices

KW - coherent assembly

KW - crystallization mechanism

KW - crystallographic analysis

KW - maximum symmetrization principle

UR - http://www.scopus.com/inward/record.url?scp=85041623177&partnerID=8YFLogxK

U2 - 10.1134/S0022476617080224

DO - 10.1134/S0022476617080224

M3 - Article

AN - SCOPUS:85041623177

VL - 58

SP - 1641

EP - 1647

JO - Journal of Structural Chemistry

JF - Journal of Structural Chemistry

SN - 0022-4766

IS - 8

ER -