From R-eudialytes to P-eudialytes
- Authors: Rastsvetaeva R.K1
-
Affiliations:
- Shubnikov Institute of Crystallography, RAS
- Issue: No 6 (2021)
- Pages: 45-53
- Section: Articles
- URL: https://journals.eco-vector.com/0032-874X/article/view/628001
- DOI: https://doi.org/10.7868/S0032874X21060053
- ID: 628001
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Abstract
Zirconosilicate eudialyte is not only one of the most complex mineral in composition and structure, but also a very mysterious. Since its discovery 200 years ago, it has been of constant interest to researchers. The uniqueness and practical importance of eudialyte ores is determined by their complexity. They are a source of rare earths and many rare elements including zirconium, hafnium, titanium, and niobium. Different chemical composition, structure, and conditions of origin of this mineral lead to a variations in its crystal chemical properties. The article discusses the crystal chemical features of eudialyte formed under specific conditions of slow crystallization at low temperatures at the last stages of cooling of the residual melt. Such conditions allowed the composition to be ordered according to the positions of the structure with a decrease in symmetry from rhombohedral to primitive. This paper describes eudialyte, first studied within the P3 symmetry, and the obtained information about its structure, which is close to real.
About the authors
R. K Rastsvetaeva
Shubnikov Institute of Crystallography, RAS
Email: rastcrys@gmail.com
Moscow, Russia
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