TY JOUR TI From teaching experience. XII. The origin of the crystal and the principle of equal immediate environment KW crystallography KW mineralogy KW nucleus KW crystal KW symmetry KW polyhedral cluster KW principle of equal immediate environment JO Vestnik of geosciences AU Voytehovskiy, Y.L. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"