InternationalMathematical, physical and chemical tablesTables for Crystallography Volume C Edited by E. Prince © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. C, ch. 3.2, pp. 158-159
## Section 3.2.2.7. Other procedures F. M. Richards
^{a} |

A novel procedure that may be useful in special circumstances is based on measuring the frequency of a vibrating string of the material in question. If the length of the string is fixed and the transverse deformation is small, the various harmonic frequencies of vibration will be related inversely to the square root of the density for small oscillations. The potential accuracy of frequency measurements makes this useful for following density changes in the sample while altering the temperature or pressure; see Rabukhin (1982).

### References

Rabukhin, V. B. (1982).*String method of measuring the density of irradiated metallic crystals. At. Energ.*

**52**, 131–132.