Designating or of a crystal system having three axes of equal length that intersect in the same plane so as to form six 60° angles and a fourth of any length that intersects the plane of the other three at a right angle.
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Having six sides.
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Relating to a crystal having three axes of equal length intersecting at angles of 60° in one plane, and a fourth axis of a different length that is perpendicular to this plane. The mineral calcite has hexagonal crystals.
(crystallography) Having three equalaxes which cross at 60° angles, and an unequal axis which crosses the others at 90° angle.
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(mineralogy) Having three equal axes intersecting at angles of 60° in one plane and one axis of variable length that is perpendicular to the others.
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Hexagonal Sentence Examples
The substance is usually optically isotropic, though sometimes it exhibits anomalous double refraction; fibrous zinc sulphide which is doubly refracting is to be referred to the hexagonal FIG.
On evaporating this solution the hydrated salt CoI 2.6H 2 0 is obtained in hexagonal prisms. It behaves in an analogous manner to CoBr 2.6H 2 0 on heating.
The Helena crystals are of tabular habit, being composed of the basal pinacoid with a very short hexagonal prism, whilst at Yogo Gulch many of the crystals affect a rhombohedral habit.
Moissanite is a rare mineral with a hexagonal crystal structure that occurs in iron-nickel meteorites and may also be called silicon carbide or carborundum in reference to its chemistry.
At the same time, however, moissanite's hexagonal crystal structure is nearly twice as refractive as a diamond's isometric one, giving it up to twice the brilliance and fire of a diamond depending on the shape and cut of the stone.