Assertion: orthoclase | /r/HasProperty | monoclinic
Facets:
Source sentences:
text: Sanidine and orthoclase are monoclinic or nearly so; the plagioclase feldspars are triclinic.
text: Orthoclase is a monoclinic alkali feldspar that has the larger optical axial angle and looks homogeneous; it does not show cross-hatched twinning.
text: orthoclase (monoclinic)  KAlSi
text: Orthoclase, being monoclinic, could not show such twinning..
text: Sanidine has a monoclinic structure, orthoclase is monoclinic, and sanidine is triclinic.