TY - JOUR T1 - Monoclinic Double Selenates of the Nickel Group JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 93 IS - 647 SP - 68 EP - 72 PY - 1917/02/01/ UR - http://dx.doi.org/10.1098/rspa.1917.0004 M3 - doi:10.1098/rspa.1917.0004 AU - Tutton, A. ER -