Precision density measurement of silicon
- 1 September 1964
- journal article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
- Vol. 68A (5) , 529-533
- https://doi.org/10.6028/jres.068a.050
Abstract
The densities of 22 large highly perfect silicon single crystals have been measured by hydrostatic weighing in water, yielding an average value of d Si ( 25 ∘ C ) = 2.329002 ± ( 7 × 10 - 6 ) g / cm 3 . An experimental precision has been achieved which exceeds the accuracy with which the absolute density of water is known. The effect of variations of the water surface tension force on the suspension wire has been mimized by using a 0.001 in. suspension wire coated with platinum black, and by doing a large number of repeated weighings of each crystal.Keywords
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