gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1951.029.212.03 Priderite, a New Mineral from the Leucite-Lamproites of the West Kimberley Area, Western Australia Norrish K. M.Sc. Research Officer of the Division of Soils, Commonwealth Scientific and Industrial Research Organization, Adelaide, South Australia. 3 1951 29 212 496 501 Copyright © 1951, The Mineralogical Society 1951 Abstract

Priderite is the name suggested for a new mineral with the formula (K,Ba)1·3(Ti,Fe)8O16. X-ray diffraction studies show that the mineral is body-centred tetragonal with a 10·11, c 2·96 Å. Structurally the mineral resembles cryptomelane, KMn8O16, the Ti of priderite being equivalent to the Mn of cryptomelane. Synthetic K- and Ba-priderites appear to be isostructural and they are probably members of a series analogous to cryptomelane-hollandite.