MS_ELASTICDB - Database of various elastic constants..

Given a reference string, uid, output the elastic stiffness matrix (in
GPa), density (in kg/m3) and a descriptive string.

[ ... ] = MS_elasticDB( uid )

Usage:
    [ C ] = MS_elasticDB( uid )
         Output the elasticity matrix corresponding to the reference
         string uid (e.g. 'olivine'). C is a 6x6 matrix and is in GPa.

[ C, rh ] = MS_elasticDB( uid )
     Also return the density in kg/m3.

[ C, rh, info ] = MS_elasticDB( uid )
     Also return a descriptive string describing the material and
     source.

See also: MS_LOAD MS_LOAD_LIST