It crystallizes in the orthorhombic system and is isomorphous with stibnite (Sb2S3), which it closely resembles in appearance.
Certain pyroxenes also crystallize in the orthorhombic system.
Gypsum thus crystallized is in its normal monosymmetric form, more stable under ordinary conditions than the orthorhombic form.
It crystallizes in the orthorhombic system, and the crystals are either prismatic or acicular in habit.
Crystallizes in the orthorhombic system, usually in tabular form, but crystals not common.
It crystallizes in the orthorhombic system, and has three directions of perfect cleavage parallel to the three planes of symmetry.
In the orthorhombic system there are three unequal axes at right angles to each other.
It is not isomorphous with the orthorhombic barium and strontium sulphates, as might be expected from the chemical formulae.
It is of less frequent occurrence in nature than copper-glance, the orthorhombic cuprous sulphide.
Barytes, which crystallizes in the orthorhombic system, has two sets of cleavages, viz.
Relating to a crystal having three axes of different lengths intersecting at right angles. The mineral topaz has orthorhombic crystals. See illustration at crystal.