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1 National Bureau of Standards, Washington, D. C.
Residual or uncombined mercury has been demonstrated by x-ray diffraction studies to be present in amalgams after their initial solidification.
This uncombined mercury disappears during the period when greatest dimensional changes occur in the hardening of the amalgam system.
A possible mechanism for the dimensional changes based on the presence and disappearance of the uncombined mercury is presented.
Submitted on December 12, 1953
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