Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
7466726
Reference Type
Journal Article
Title
Zirconolite, CaZrTi2O7, re-examined from its type locality at Afrikanda, Kola Peninsula, Russia and some Synroc implications
Author(s)
Bulakh, AG; Nesterov, AR; Williams, CT
Year
2006
Is Peer Reviewed?
1
Journal
Neues Jahrbuch fuer Mineralogie. Abhandlungen
ISSN:
0077-7757
Volume
182
Issue
2
Page Numbers
109-121
Language
English
DOI
10.1127/0077-7757/2006/0034
Web of Science Id
WOS:000237799600001
URL
http:///www.schweizerbart.de
Exit
Abstract
Zirconolite of BORODIN et al. (1956) from type locality at Afrikanda, Kola Peninsula, Russia, consists of a core of calzirtite and baddeleyite, and a rim composed of an initial CaZrTi2O7 phase and various secondary minerals. This initial phase is both sector zoned and oscillatory zoned, and has variable composition. The principal substitutions are as follows: REE + Ti double left right arrow Ca + Me5+; Me6+ + Me2+ double left right arrow 2Ti; ACT(4+) + Me2+ double left right arrow Ca + Ti. Alteration of the initial phase is characterised by introduction of Si, H2O, Ba, Th and U, loss of Ca, Fe, Ti and Zr, and little change in Nb and REE. Zirconolite is an important constituent of Synroc, and it could easily be replaced by Si-bearing phases that concentrate U and Th much more then in initial ceramic material.
Keywords
zirconolite; zirkelite; Afrikanda; Kola Peninsula; Russia; calzirtite; baddeleyite; Symoc
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity