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Preparation and Thermal Behavior of Magnesium‐Germanium Hydroxide
Author(s) -
Yamaguchi Osamu,
Matumoto Hiroshi,
Morikawa Shinichi,
Shimizu Kiyoshi
Publication year - 1983
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1983.tb10631.x
Subject(s) - spinel , germanium , magnesium , hydrolysis , hydroxide , amorphous solid , materials science , phase (matter) , inorganic chemistry , mineralogy , chemistry , chemical engineering , nuclear chemistry , crystallography , metallurgy , silicon , organic chemistry , engineering
Poorly crystallized Mg 3 Ge 2 O 5 (OH) 4 powder was prepared by simultaneous hydrolysis of magnesium and germanium alkoxides, followed by washing and drying. When this material is heated, spinel‐type Mg 2 GeO 4 and MgGeO 3 crystallize at 580° to 850°C and 860° to 1070°C, respectively. The spinel subsequently transforms to the olivine‐type structure at 940° to 1050°C. Both Mg 2 GeO 4 and MgGeO 3 crystallize directly from an amorphous phase .