Zeolites Na,Cs-RHO, Cd,Cs-RHO, and Li,NH₄-RHO were synthesized in an aqueous ion-exchange media and studied by powder X-ray diffraction. Their thermochemistry was investigated by differential scanning calorimetry and high temperature oxide melt solution calorimetry. The formation enthalpy from binary oxide components of hydrated zeolite RHO varies linearly with the average ionic potential (Z/r) of the extra-framework cations and ranges from −34.46 ± 0.52 kJ/mol for Na,Cs-RHO to −16.75 ± 0.57 kJ/mol for Cd,Cs-RHO. The formation enthalpies for dehydrated zeolite RHO range from −25.49 ± 0.64 kJ/mol for Na,Cs-RHO to +4.12 ± 0.99 kJ/mol for Li,NH₄-RHO. These values do not vary linearly with average ionic potential but do show a linear relationship with distortion parameter.

在水性离子交换介质中合成了Na，Cs-RHO，Cd，Cs-RHO和Li，NH ₄ -RHO沸石，并通过粉末X射线衍射进行了研究。通过差示扫描量热法和高温氧化物熔体溶液量热法研究了它们的热化学性质。水合沸石RHO的二元氧化物组分的形成焓随骨架外阳离子的平均离子电势（Z / r）线性变化，对于Na，Cs-RHO为−34.46±0.52 kJ / mol至−16.75±0.57 Cd，Cs-RHO的kJ / mol。脱水沸石RHO的形成焓在Na，Cs-RHO的−25.49±0.64 kJ / mol到Li，NH ₄ -RHO的+4.12±0.99 kJ / mol范围内。这些值不随平均离子电势线性变化，而是与畸变参数呈线性关系。