Preparation and some properties of synthetic proustite single crystals

✍ Scribed by M. I. Holovey; I. D. Olexeyuk; M. I. Gurzan; Prof. Dr. I. S. Rez; V. V. Panyko; Yu. V. Voroshilov; M. Yu. Rigan; I. G. Ganeyev; A. V. Bogdanova

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 411 KB
• Volume: 6
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.19710060507

✦ Synopsis

Preparation and some Properties of Synthetic Proustite Single Crystals

Conditions for the preparation of proustite single crystals are reported. For selecting these conditions temperature gradients in the crystallisation zone and in the melt, the rate of moving of the crystallisation front, the radial gradient, tube geometry, stabilisation of temperature, mechanisms of zone travelling, partial pressures were changcd. -Differential-thermal, X-ray, and spectral-chemical analysis were applied to initial substances and final crystal bodies.

To dccrcase the influence of spontaneous crystallisation an optimal temperature gradient was applied approaching maximum undercooling a t the liquid-solid interface. -Optically transparent proustite crystals resulted. I n the range from 1 to 12 pm they show 80% transparency. Microhardness was measured along the growth direction which deviated from the c-axis about 25".

Es werden die Bedingungen fur die Herstellung von Proustit-Einkristallen mitgetcilt. Um diese zu bestimmen wurden der Temperaturgradient der Kristallisationsund der Schmelzzone,