Phase-X
Yang H, Konzett J, Prewitt C T
American Mineralogist 86 (2001) 1483-1488
Crystal structure of phase X, a high pressure alkali-rich hydrous silicate
and its anhydrous equivalent
Sample: JKW42
_database_code_amcsd 0002744
4.9827 4.9827 6.4354 90 90 120 P-31m
atom     x   y     z occ Uiso
NaA    1/3 2/3   1/2 .89 .042
MgM    2/3 1/3     0 .94 .011
AlM    2/3 1/3     0 .06 .011
Si       0   0 .2480     .009
O1       0   0   1/2     .054
O2   .3187   0 .8156     .015