eFunda: Properties of Piezo Material Bismuth Germanate
engineering fundamentals Piezo Data: BiGeO
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Bismuth Germanate
Crystal symmetry class Cubic 43m
Density 7095 kg/m3
Constitutive data is presented in the Strain-Charge format.
Compliance
9.4 1.8 1.8 0 0 0
1.8 9.4 1.8 0 0 0
1.8 1.8 9.4 0 0 0
0 0 0 23 0 0
0 0 0 0 23 0
0 0 0 0 0 23
*10-12 
Piezoelectric Coupling
0 0 0 0.87 0 0
0 0 0 0 0.87 0
0 0 0 0 0 0.87
*10-12 
Relative Permittivity
16 0 0
0 16 0
0 0 16
,  8.854 *10-12 
For a description of the ordering convention used to layout the constitutive matrices, see Subscript Ordering.
Glossary
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