Комиссия IMA по новым минералам и названиям минералов: нормы и рекомендации по номенклатуре минералов, 1998 Номенклатура гомологических рядов с разной периодичностью строительных блоков

Individual names should not be given to members of variable-fit homologous series (see a previous section). Instead, an optional descriptive modifier may be appended, describing the match between the building blocks. The contents of the appended symbol will vary according to the precision required or the method used, should contain the word "homologue", and should be enclosed by < > brackets. An example is "cylindrite < homologue (19,13)Q/(30,12)H >" for a homologue of the cylindrite series with a tetragonal (quadratic) building block of 19 by 13 units that is commensurable with a hexagonal block of 30 by 12 units.


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