Basaluminite and hydrobasaluminite, two new minerals from Northamptonshire

S. E. Hollingworth, F. A. Bannister
1950 Mineralogical Magazine and Journal of the Mineralogical Society  
White mineral coating joint-faces in quarries in the Northampton ironstone (Inferior Oolite) was long ago recorded as allophane. W. D. Herman who determined the mineral from the surface of a sandstone rock in a quarry opened in 1871 also analysed an unnamed white earthy mineral from crevices in the ironstone and obtained a composition close to that of fully hydrated halloysite. During the six-inch geological survey of that ironstone field in 1939–44 the occurrence of similarly situated white
more » ... y situated white incrustations and joint infillings was found to be widespread especially in the shallow workings where the ferrous minerals chamosite and chalybite have been oxidizedto produce a limonitie ore.
doi:10.1180/minmag.1950.029.208.03 fatcat:7bp4jq2fardcbhijitxshaflnu