Vivianite
Specimen ID: GT2-XYX
Vivianite : Fe2+Fe2+2(PO4)2·8H2O
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“Field of view ca. 3 cm. The Matrix of the Vivianite nodules is a mixture of clay and sand which is brittle if dry. Collected ca. 1978. ”
Volker Betz - 10th May 2008
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