cell 4.903 4.903 5.393 90 90 120
Titl Alpha-Quartz
atom O1  0.415   0.272   0.120
SYMM y-x,-x,z+0.3333
SYMM -y,x-y,z+0.3333
SYMM x-y,-y,-z
SYMM y, x, 0.6667-z
SYMM -x,y-x,0.3333-z
atom Si2 0.465   0.0     0.0
symm -x, -x, 0.3333
symm  0,  x, 0.6667
box  .6
end