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High-temperature investigations of the rare earth NZP phosphates R1/3Zr2(PO4)3 (R= La, Nd, Eu, Lu) by drop calorimetry

“…Among the various compounds that are considered for radioactive waste immobilization, the attention has been drawn to the phosphates with a framework-type structure of NaZr 2 (PO 4 ) 3 , generally abbreviated as NZP [1][2][3][4][5]. The structure of this phosphate was first studied in 1968 [6].…”

“…The uniqueness of NZP compared to other waste forms is the ability to include a large variety of cations in its structure, based on the principles of isovalent and heterovalent isomorphism that is possible for different cation positions of the structure [5]. This is an undeniable advantage with regard to complex waste compositions.…”

Isomorphism in d-and f-element phosphates having framework crystal structure and crystallochemical conception of NZP matrix for radionuclide immobilisation

“…List of reviewed references comprises nearly 300 papers [10]. We have analysed more then 150 compounds, containing more then 50 various elements in various combinations.…”

Tungstate Based Ceramics Obtained By Spark Plasma Sintering Method – Possible Material for Consolidation of Radioactive Wastes’ Components

“…In the frame of the problem of radioactive waste management, specialists pay attention to compounds with structures of natural minerals: monazite [5][6][7], kosnarite [8][9][10][11] MIE-2017 langbeinite [11,13], whitlockite [14], etc. Crystalline materials, and ceramics with the structure of the mineral scheelite are less studied.…”