TY - JOUR T1 - Monoclinic Double Selenates of the Manganese Group JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 101 IS - 710 SP - 225 EP - 245 PY - 1922/06/01/ UR - http://dx.doi.org/10.1098/rspa.1922.0040 M3 - doi:10.1098/rspa.1922.0040 AU - Tutton, A. ER -