Irregular shaped crystals of indeterminate crystalline form. Anhedral crystals grew in an impeded environment, such as adjacent to simultaneously growng crystals, producing a material whose characteristics used to determine crystalline form, such as plane faces, are not visible. In a rock where most of the grains are anhedral, the fabric is said to be allotriomorphic granular.
Synonyms and Related Terms
xenomorphic; allotriomorphic; anédrico (Port.); xenomórfico (Port.); alotriomórfico (Port.)
Sources Checked for Data in Record
- Submitted information Comment: Jose Delgado Rodrigues, LNEC, 2009.
- Walter C. McCrone, John Gustave Delly, The Particle Atlas, W. McCrone Associates, Chicago, IV, 1972