TY JOUR TI MATERIAL COMPOSITION OF CLAY FROM THE AL-NAJAF FIELD (IRAQ) KW kaolinite KW illite KW montmorillonite KW x-ray phase analysis KW energy dispersion method KW electron microscopic analysis KW thermogravimetric analysis JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Vezentsev, A.I. AU Volovicheva, N.A. AU Korolkova, S.V. AU Al-Ateya, A.. PY 2020 IS 5 PB Belgorod State Technological University named after V.G. Shukhov