Citation: Yang, H.; Hazen, R. M.; Prewitt, C. T.; Finger, L. W.; Lu, R.; Hemley, R. J. (1998). High-pressure single-crystal X-ray diffraction and infrared spectroscopic studies of the C2/m-P2_1/m phase transition in cummingtonite Sample: P = 0.00 GPa, in air. American Mineralogist, 83, pp. 288-299.