Citation: Winter, J. K.; Okamura, F. P.; Ghose, S. (1979). A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition T = 500 C Note: this sample of feldspar is from Tiburon, Marin County, California, USA. American Mineralogist, 64, pp. 409-423.