Hi, I refining a rhombohedral cell with hexagonal setting and I saw that the a and b cell edges have same value but different sigma. Why ? Davide Reciprocal metric tensor:
names : A11 A22 A33 A12 A13 A23 values: 0.054780220 0.054780220 0.003540059 0.054780220 0.000000000 0.000000000 esds : 0.000002049 0.000000214 New unit cell: names : a b c alpha beta gamma Volume values: 4.933527 4.933527 16.807176 90.0000 90.0000 120.0000 354.275 esds : 0.000123 0.000031 0.000508 0.0000 0.0000 0.0005 0.010
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