HYDROTHERMAL SYNTHESIS AND MOSSBAUER-SPECTRA STUDY OF HYDROGARNET SR3FE2(OH)(12)

Authors
LI GS MAO YC LI XR ZHU LJ FENG SH
Citation
Gs. Li et al., HYDROTHERMAL SYNTHESIS AND MOSSBAUER-SPECTRA STUDY OF HYDROGARNET SR3FE2(OH)(12), Gaodeng xuexiao huaxue xuebao, 19(8), 1998, pp. 1195-1199
Citations number
16
Categorie Soggetti
Chemistry
Journal title
Gaodeng xuexiao huaxue xuebao → ACNP
ISSN journal
02510790
Volume
19
Issue
8
Year of publication
1998
Pages
1195 - 1199
Database
ISI
SICI code
0251-0790(1998)19:8<1195:HSAMSO>2.0.ZU;2-A
Abstract
A single phase hydrogarnet Sr3Fe2(OH)(12) was synthesized from mild hy drothermal systems. For Sr3Fe2(OH)(12), the hydroxyl groups of Sr-OH d odecahedra were decomposed in the form of four water molecules around 573 K, On heating Sr-Fe hydrogarnet in air or oxygen, an oxidation pro cess from Fe(III) to Fe(IV) takes place. Valence variation of the fram ework ions Fe( III) determined the decomposition process and the struc tural types of the products, Two octahedra of Fe(OH)(6) in Sr-Fe hydro garnet were first detected by combining Mossbauer spectra and XPS.