Si
V
Ca
O
Ball and Stick
Stick
Spacefill
Polyhedral
https://virtual-museum.soils.wisc.edu/wp-content/uploads/sites/7/2016/08/pentagonite_poly1.txt
https://virtual-museum.soils.wisc.edu/wp-content/uploads/sites/7/2016/08/pentagonite_poly2.txt
https://virtual-museum.soils.wisc.edu/wp-content/uploads/sites/7/2016/08/pentagonite_poly3.txt
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Pentagonite
Pentagonite is a silicate that is considered “unclassified”. Its silicate backbone is similar to that of a phyllosilicate structure except that alternating pairs of tetrahedra are inverted.
Highlighting Features
Silicon (Si) atoms A silicate sheet Calcium (Ca) atoms Vanadium (V) atoms Single unit cell All atomsEvans, H.T. 1973. The crystal structures of cavansite and pentagonite. American Mineralogist 58:412-424.