# index ellipsoid

> aspect of crystal optics

**Wikidata**: [Q453471](https://www.wikidata.org/wiki/Q453471)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Index_ellipsoid)  
**Source**: https://4ort.xyz/entity/index-ellipsoid


## References

1. Freebase Data Dumps. 2013