Norimasa, NishiyamaRapp, RobertIrifune, TetsuoSanehira, TakeshiYamazaki, DFunakoshi, K2015-12-100342-1791http://hdl.handle.net/1885/52438In situ X-ray diffraction measurements of KAlSi3O8 -hollandite (K-hollandite) were performed at pressures of 15-27 GPa and temperatures of 300-1,800 K using a Kawai-type apparatus. Unit-cell volumes obtained at various pressure and temperature conditionsKeywords: Equations of state; Phase transitions; Potassium compounds; Tectonics; Thermal expansion; Thermodynamic properties; X ray diffraction analysis; Continental crust; Hollandite; Phase boundary; Silicates; P-T conditions; phase transition; subduction zone; X- Continental crust; Equation of state; High pressure and temperature; K-hollandite; Phase boundaryStability and P-V-T equation of state of KAISi 3 O 8 -hollandite determined by in situ X-ray observations and implications for dynamics of subducted continental crust material200510.1007/s00269-005-0037-y2015-12-09