K Feldspar: Mineral information, data and localities.
Laacher See, Eifel District, Germany: 0: 293: 0000695: Sanidine: Keefer K D, Brown G E (1978) Crystal structure and composition of sanidine and high albite in cryptoperthitic intergrowth Note this sample of feldspar is from the Rabb Canyon pegmatite, Grant County, New Mexico, USA American Mineralogist 63 1264-1273: 1978: 0: 293: 0001125: Sanidine