423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
324 | DF | SILICON OR COMPOUND THEREOF {4} |
325 | DF | .~ Oxygen containing {2} |
326 | DF | .~.~ Metal containing (i.e., silicate) {3} |
327.1 | DF | .~.~.~ Aluminum containing {2} |
328.1 | DF | .~.~.~.~ Aluminosilicate {3} |
328.2 | DF | .~.~.~.~.~ Crystalline {1} |
328.3 | .~.~.~.~.~.~ Mica |