Below this temperature the octahedral, above it the monoclinic, is the stable form.
They are colorless, pointed, often needle-like, octahedral crystals (Fig. 6).
The irons giving the Widmansttten figures are known as octahedral irons.
Sulphur exists in two well-known crystalline forms—rhombic, or octahedral, and monoclinic, or prismatic sulphur.
A handful of small cubes and octahedral pebbles were passed up for inspection.
Nitrate of Barium occurs in octahedral crystals, soluble in water.
Shell thick walled, octahedral, fourteen times as broad as one mesh.
Brass was decomposed, and its constituent copper crystallized in cubic and octahedral forms aggregated in beautiful branches.
Bisulphate of potassium, added to concentrated solutions, gives a precipitate of octahedral crystals of alum:—8.
Codeia is left in solution, and is obtained in octahedral crystals by spontaneous evaporation.