Assertion: calcite | /r/HasProperty | uniaxial
Facets:
value: with negative bi-refringence
type: OTHER
value: optically
type: DEGREE
Source sentences:
text: Optically, calcite is uniaxial with negative bi-refringence, the index of refraction for the ordinary ray being greater than for the extraordinary ray; for sodium-light the former is 1.6585 and the latter 1.4862.