Sodium fluorouranates were studied to get the refined value of one of the fundamental constants with determination of differences between various uranium isotopes contained in these compounds. Such compounds as sodium heptafluorouranate can be classified as molecular substances with covalent bonds. The approach to the assessment of decomposition temperature of sodium fluoride compounds with various uranium isotopes based on the Mendeleev and Karapetyants methods, as well as on the quantum Landau representations is proposed. The Landau equation for the boiling point of isotopic compounds was corrected. The estimated decomposition (boiling) temperatures of sodium heptafluorouranates containing uranium isotopes ²³⁵U, ²³⁴U, and ²³²U were 453.8, 453.0, and 451.4 K respectively. The sublimation temperature of ²⁷¹SgF₆ was estimated.

通过测定这些化合物中所含各种铀同位素之间的差异，对氟尿酸钠进行了研究，以获得基本常数之一的精确值。诸如七氟尿酸钠之类的化合物可以归类为具有共价键的分子物质。提出了基于门捷列夫和卡拉佩蒂恩斯方法以及量子朗道表示法评估各种铀同位素对氟化钠化合物分解温度的评估方法。修正了有关同位素化合物沸点的Landau方程。含铀同位素²³⁵ U，²³⁴ U和^232的七氟铀酸钠的估计分解（沸腾）温度U分别为453.8、453.0和451.4K。估计升华温度为²⁷¹ SgF ₆。