Weloganite occurs in an alkalic sill which has intruded Ordovician limestone at St-Michel, Montreal Island, Quebec. Chemical analysis of the new mineral is ideally Sr 5 Zr 2 C 9 H 8 O 31 . Weloganite is trigonal, space group P3 (sub 1,2) , hexagonal dimensions a=8.96, c=18.06 A, D m =3.22, D c =3.26 for Z=2. The strongest lines of the X-ray powder pattern are 2.81 A (10), 4.35 (9), 2.59 (7), 2.227 (7), 2.009 (7). The mineral occurs predominantly as yellow crystals which are roughly hexagonal in outline and typically irregular in width.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.