The effect of various heat treatments on BaSO4(60 mole per cent)/CaSO4(40 mole per cent) was studied by i.r. spectroscopy and X-ray diffraction. Under specific conditions a solid solution of the above composition, isotypic (isostructural) with BaSO4(barite) was found to occur. X-ray diffraction analysis gave the following unit cell parameters: a = 8·480 ± 0·009, b = 5·397 ± 0·008 and c = 6·965 ± 0·008 A ̊. © 1970.
Vojtěch, O., Moravec, J., Volf, F., & Dlouhá, M. (1970). BaSO4CaSO4 solid solutions isotypic with BaSO4. Journal of Inorganic and Nuclear Chemistry, 32(12), 3725–3730. https://doi.org/10.1016/0022-1902(70)80544-9