Studies on twin boundaries in calcite crystals

✍ Scribed by Dr. C. C. Desai

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 234 KB
• Volume: 16
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.19810160911

✦ Synopsis

Abstract

Natural single crystals of calcite have been cleaved along (100) planes and cleavage faces have been etched in 2% and 3% citric acid solutions. Etching produces twin boundaries oriented in 〈010〉 directions. The etch pits on the two sides of the twin boundary are oppositely oriented. It has been conjectured that the rows of pits might have been formed due to etching of dislocations on twin boundaries. One to one correspondence of twin boundaries has been established on matched cleavage faces. This is further confirmed by studying the induced twin regions produced on a (100) cleavage plane by indenting that plane itself. The implications are discussed.