Zircon
Finch R J, Hanchar J M, Hoskin P W O, Burns P C
American Mineralogist 86 (2001) 681-689
Rare-earth elements in synthetic zircon: Part 2. A single-crystal
X-ray study of xenotime substitution
Sample: Gd+P (30)
_database_code_amcsd 0002647
6.6213 6.6213 5.9879 90 90 90 *I4_1/amd
0 -.25 .125
atom x     y     z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Si   0   .75   5/8
Zr   0   .75   1/8
O    0 .0660 .1959   .008   .006   .005      0      0   .000