Assertion: calcite's cleavage | /r/HasProperty | parallel
Facets:
value: to the rhombohedron form
type: OTHER
value: in three directions
type: LOCATION
value: usually
type: DEGREE
Source sentences:
text: Cleavage is usually in three directions parallel to the rhombohedron form.
text: Cleavage is usually in three directions parallel to the rhombohedron form.
text: An important property of calcite is the great ease with which it may be cleaved in three directions; the three perfect cleavages are parallel to the faces of the primitive rhombohedron, and the angle between them was determined by W. H. Wollaston in 1812,, with the aid of his newly invented reflective goniometer, to be 74° 55'.
text: An important property of calcite is the great ease with which it may be cleaved in three directions; the three perfect cleavages are parallel to the faces of the primitive rhombohedron, and the angle between them was determined by W. H. Wollaston in 1812,, with the aid of his newly invented reflective goniometer, to be 74° 55'.