cis-1,3,3,3-Tetrafluoropropene (HFO-1234ze(Z), R-1234ze(Z)) is a hydrofluoroolefin which has been considered for use as a refrigerant in high-temperature heat pumps."Measurements and Correlations of cis-1,3,3,3-Tetrafluoroprop-1-ene (R1234ze(Z)) Subcooled Liquid Density and Vapor-Phase PvT", Laura Fedele, J. Steven Brown, Giovanni Di Nicola, Sergio Bobbo & Mauro Scattolini, International Journal of Thermophysics 35 (2014), pp. 1415–1434, . References