Assertion: calcite's property | /r/HasProperty | great ease
Facets:
Source sentences:
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'.