Incorporation of Manganese (II) in Beta-Tricalcium Phosphate from EPR and ENDOR Measurements for Powders

被引：1

作者：

Murzakhanov, Fadis F. ^{[1
]}

Forysenkova, Anna A. ^{[2
]}

Fadeeva, Inna, V ^{[2
]}

Mamin, Georgy, V ^{[1
]}

Gafurov, Marat R. ^{[1
]}

机构：

[1] Kazan Fed Univ, Inst Phys, Kremlevskaya 18, Kazan 420008, Russia

[2] Russian Acad Sci, AA Baikov Inst Met & Mat Sci, Leninsky Prospect 49, Moscow 119334, Russia

来源：

CERAMICS-SWITZERLAND | 2022年 / 5卷 / 03期

关键词：

tricalcium phosphate; manganese; ceramics; catalyst; electron paramagnetic resonance; ELECTRON-PARAMAGNETIC-RESONANCE; HETEROGENEOUS CATALYSTS; CALCIUM PHOSPHATES; CRYSTAL-STRUCTURE; HEAVY OIL; HYDROXYAPATITE; CHEMISTRY; OXIDATION; TITANIUM; NICKEL;

D O I：

10.3390/ceramics5030025

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Powders of beta-tricalcium phosphate (beta-TCP, Ca3PO4) doped with manganese (Mn2+) are comprehensively analyzed with electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) techniques. The modeling of the spectra permitted to calculate the values of zero-field splitting (B-2(0) = -904 MHz; B-4(0) = -1.41 MHz and B-4(3) = 195.2 MHz) and explain the origin of the low-field hyperfine structures as the allowed spin transitions of fine structure. Three structurally inequivalent positions for Mn2+ in the beta-TCP crystal lattice are identified and their g-factors and hyperfine constants are quantified. The obtained results can serve as fundamental background to the study of structurally disordered matrices with high spin (S >= 1) impurities which are important for catalytic systems.

引用

页码：318 / 329

页数：12

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