TY JOUR TI X-ray and infrared spectroscopic study of natural zeolite KW X-ray diffraction KW IR-spectrum analysis KW natural zeolite KW mordenite KW crystal system KW crystallization JO Technique and technology of silicates AU Mamedova, G.A. PY 2016 IS 23 PB Individual Entrepreneur Svetlana Vasilievna Samchenko