The transverse contraction ,
often known as the Poisson ratio, expresses the relationship
of the (negative) transverse contraction, 2
to the longitudinal extension 1
Expressed as a formula,
= -2
/ 1
or, rearranged as 2
= -
* 1
= -
* /
E , we obtain
= - E * 2
/ .
Values for ceramics lie typically in the range
0,18 - 0,3.
,
often known as the Poisson ratio, expresses the relationship
of the (negative) transverse contraction, 
2
to the longitudinal extension 
/
E , we obtain 
0,18 - 0,3.