Cast Stone Matrix Based on Comelts of Basalt and Metal Oxides: Part I. System Basalt–MxOy (M = Sr, Ln)

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochemistry Pub Date : 2024-04-23 DOI:10.1134/s1066362224010028

K. V. Martynov, V. V. Kulemin, E. P. Krasavina, I. A. Rumer, Yu. M. Nevolin, S. A. Kulyukhin

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Abstract

This work examines cast stone matrices (CSM) fabricated by comelting basalt and Sr, Ln (Ce, Nd, Gd) oxides. Matrices containing glass and clinopyroxene as the major phases were established to be resulted from the comelting of basalt with SrO. Strontium partially replaces calcium in clinopyroxene, but mostly enriches the melt in contact with crystallizing clinopyroxene. When this melt cools, glass is formed containing up to 31 wt % SrO. The doping of basalt with oxides of rare earth elements (REE) M_xO_y: CeO₂, Nd₂O₃, Gd₂O₃ taken in a weight ratio of 4 : 1 and 2 : 1, results in the formation of CSM, the main permanent phases of which are glass and clinopyroxene. In addition, magnesioferrite can crystallize from a basaltic melt upon cooling, and phases of cerianite CeO₂ or britholite Ca(Nd,Gd)₄(SiO₄)₃O can crystallize depending on the basalt/M_xO_y weight ratio.

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基于玄武岩和金属氧化物凝灰岩的铸石基质：第一部分：玄武岩-MxOy（M = Sr、Ln）体系

摘要这项工作研究了由玄武岩和Sr、Ln（Ce、Nd、Gd）氧化物熔融制成的铸石基质（CSM）。研究证实，玄武岩与氧化锶的熔融作用产生了以玻璃和霞石为主要物相的基质。锶部分取代了霞石中的钙，但主要富集了与结晶霞石接触的熔体。当这种熔体冷却时，会形成含氧化锶高达 31 wt % 的玻璃。在玄武岩中掺入稀土元素（REE）氧化物 MxOy：CeO2、Nd2O3、Gd2O3 的重量比分别为 4 : 1 和 2 : 1，从而形成 CSM，其主要永久相为玻璃和挛辉石。此外，玄武岩熔体冷却后可结晶出镁铁矿，根据玄武岩/MxOy 的重量比，还可结晶出铈镧矿 CeO2 或红柱石 Ca(Nd,Gd)4(SiO4)3O。

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.

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