New acquisitions of the Mineralogical Institute

Abstract

Currently, crystallography widely uses graphical techniques to solve its problems. Increasing accuracy is also one of the goals set in the development of graphical operations. As for the design of the new device, we mainly note the much larger dimensions of the device, of which the black hemisphere, as the main working part of the device, has a diameter of about one arshin plus. The second device is a universal three‑axis contact goniometer. It is used for routine measurements by the universal method of crystals so large that they can no longer be mounted on the crystal holder of ordinary goniometers. The third device is designed to facilitate the crystallization process. The principle of its operation consists in the rhythmic heating and cooling of the vessel containing the solution in which crystallization occurs.

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