| orthorhombic | <chemistry> Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See Crystallization. Origin: Ortho- + rhombic. Source: Websters Dictionary (01 Mar 1998) |
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| orthorhombic |
A crystal system where the cell sizes (a,b,c) have different lengths, but all of the inter-axis angles are 90deg. This has no tetrads (axes of 4-fold rotational symmetry) or triads (axes of 3-fold symmetry). It does have 3 diads (axes of 2-fold symmetry), centred in the middle of each face.
Ãâó: www.asi.org/adb/m/05/mineral-glossary.html
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