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17 We notice that other authors have also observed an impurity in their
˚
˚
samples to which a small monoclinic cell (a = 14.342 A, 7.185 A, 7.412
◦
3
˚
˚
A, b = 107.2 , V = 729.63 A ) was later assigned. It turns out that the
transformation of this cell via the matrix (1 0 2, 0 -1 0, 0 0 -2) yields a
cell with unit cell vectors essentially identical to those of our phase II;
this suggests the same chemical identity of impurities observed. See: K.
402 | Dalton Trans., 2012, 41, 396–402
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