During the course of an investigation of pure compounds for use in ceramic fields, the synthesis of three garnets of the general formula 3CaO·R2O3·3SiO2 was attempted by dry reaction using chemically pure oxides as follows:

GrossulariteAndraditeUvarovite
 
CaO 37.3 33.0 33.5 
Al2O3 22.7 — — 
Fe2O3 — 31.5 — 
Cr2O3 — — 30.6 
SiO2 40.0 35.5 35.9 
GrossulariteAndraditeUvarovite
 
CaO 37.3 33.0 33.5 
Al2O3 22.7 — — 
Fe2O3 — 31.5 — 
Cr2O3 — — 30.6 
SiO2 40.0 35.5 35.9 

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