Isao Kusachi, Yasushi Takechi, Shoichi Kobayashi, Junji Yamakawa, Yoshihiro Nakamuta, Kyue-Hyung Lee, Shoji Motomizu CaB2O4 6H2O = 40.1 + 2*10.1 + 4*16.0 + 6*18.0 Shoichi Kobayashi, Tamami Ando, Akiko Kanayama, Mitsuo Tanabe, Shigetomo Kishi, Isao Kusachi