Synthesis of substitutional solid solutions in Na2O-P2O5-In2O3-M2IIIO3 (MIII = Cr, Fe, and Mn) systems

• Published in: Russian journal of inorganic chemistry Vol. 57; no. 5; pp. 650 - 653
• Main Authors: Ivanenko, A. P., Nagorny, P. G., Boiko, R. S., Kornienko, Z. I.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 2012
• Subjects: Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Synthesis and Properties of Inorganic Compounds; Substitutional Solid Solution; Double Phosphate; Electronic Diffuse Reflectance Spectrum; Dihydro Phosphate; Sodium Metaphosphate
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023612050099

Solid solutions based on Na
7
(InP
2
O
7
)
4
PO
4
and Na
3
In
2
(PO
4
)
3
, where chromium, iron, and manganese substitute for indium, have been prepared. When chromium and iron substitute for indium in Na
7
(InP
2
O
7
)
4
PO
4
, a continuous solid solution series exists. When manganese substitutes for indium, it enters the compound in the oxidation state +3. The substitution of chromium for indium in Na
3
In
2
(PO
4
)
3
occurs within the range from 0.11 to 0.74 (mol/mol), and that of iron for indium, from 0.09 to 0.62 (mol/mol). When manganese substitutes for indium, it enters the structure of the crystalline phase in insignificant amounts as a two-charged cation.