# Characteristics of Crystals

Department of the Air Force Characteristics of Crystals AVA07553VNB1, 1964 Studies frequency stability and the use of the crystal controlled oscillator in obtaining stability. Describes the piezoelectric effect of crystals by type and the relationship between crystal thickness and frequency. Shows various crystal cuts.

- Kind: Educational
- Year: 1964
- By: Department of the Air Force
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/gov.ntis.ava07553vnb1)
- Licence or status: [Public domain (Creative Commons dedication)](http://creativecommons.org/licenses/publicdomain/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

Not offered: its uploader marks it public domain, and the US Copyright Office's records do not settle that it is (a record that may be another film's, a film first published abroad, a year when renewal was automatic, or a country they do not name). Unclear is not offered.