Citation: Sasaki, S.; Chen, H. K.; Prewitt, C. T.; Nakajima, Y. (1983). Re-examination of "P2_1/a coesite" Note: z(O7), z(O8) corrected Note: This is not the structure of coesite, it is a model for a twin. Zeitschrift fur Kristallographie, 164, pp. 67-77.