参考文献
Hackspill, L.; Grandadam, R.
Annales de Chimie (Cachan, France), 1926 , vol. 5, p. 232
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Hackspill, L.; Grandadam, R.
Helvetica Chimica Acta, 1928 , vol. 11, p. 1008 - 1008
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Gmelin Handbook: Fe: MVol.A3, 22, page 368 - 370