PHASE COMPOSITION AND CRYSTAL STRUCTURE OF DURIAN (DURIO ZIBETHINUS) HUSK WASTE POWDER USING RIETVELD METHOD - Khairiah, Khairiah; Pendidikan Fisika FKIP Universitas Muslim Nusantara Alwashliyah Medan (Universitas Islam Negeri Sumatera Utara Medan, 2018)