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[xd0533@163.com]

Dear users,
I did YTaO4 acell geometry.I use TM Pseudopotentials.Fist I modify nuclear 
positions,and use optcell 0 ,ionmov 2.Then I did acell geometry.Part of the 
input file is:
ionmov 3
optcell 2
tolmxf 5.0d-4
dilatmx 1.2
The experimental value of lattice constants is:9.6584000000E+00 
1.0011770000E+01 1.0300900000E+01 Bohr
The result I get is: 1.0700498247E+01 1.1096190361E+01 1.0438822477E+01 Bohr
Only the last one is in good agreement with experimental value.I wonder 
whether this is correct? Why are the front two constants worse agreement 
with experimental value?
Best wishes!
xd