[Pw_forum] disagreement of *.in and *.out file in VCSexample

[程迎春]

Dear pwscf users:
     I checked VCSexample in V4.0, and found a disagreement in the *.in and
*.out. For example:
In the As.vcs00.in file,the system is defined as follows:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+   ibrav = 0 ,
+   A = 3.70971016 ,
+   B = 3.70971016 ,
+   C = 3.70971016 ,
+   cosAB = 0.49517470 ,
+   cosAC = 0.49517470 ,
+   cosBC = 0.49517470 ,
+
+   CELL_PARAMETERS cubic
+    0.58012956  0.00000000  0.81452422
+   -0.29006459  0.50240689  0.81452422
+   -0.29006459 -0.50240689  0.81452422
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
In the beginning of As.vcs00.out file,the system is changed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+     bravais-lattice index     =            0
+     lattice parameter (a_0)   =       7.0103  a.u.
+     unit-cell volume          =     245.3705 (a.u.)^3
+
+     celldm(1)=   7.010336  celldm(2)=   1.000000  celldm(3)=   1.000000
+     celldm(4)=   0.495175  celldm(5)=   0.000000  celldm(6)=   0.000000
+
+     crystal axes: (cart. coord. in units of a_0)
+               a(1) = (  0.580130  0.000000  0.814524 )
+               a(2) = ( -0.290065  0.502407  0.814524 )
+               a(3) = ( -0.290065 -0.502407  0.814524 )
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

a=3.70971016A -> celldm(1)=7.010336a.u. and celldm(2)=celldm(3)=1
celldm(4)=cos(bc)=0.495175
but why celldm(5),celldm(6)are equal to 0?

-- 
Y. C. Cheng
Department of Phyics
Nanjing University
Nanjing 210093
P. R. China
Tel: 86-25-83592907
Email: yccheng.nju at gmail.com
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