No.1 DONG DA DI CHONG WEN MEN WAI, Peking, Peking, China,100062
calcium fluoride (caf2) crystal, barium fluoride (baf2) crystal, magnesium fluoride (mgf2) crystal, lithium fluoride (lif) crystal, cerium flouride ceric fluoride (cef3) crystal, lead fluoride (pbf2) crystal