All of the symmetry P-3c1 Fluocerite-(La)

What does it look like?

Image from the space group project list https://crystalsymmetry.wordpress.com/230-2/

Image from the space group project list https://crystalsymmetry.wordpress.com/230-2/

What is it?

This is the lanthanum variation of fluocerite, a mineral found in hydrothermal veins of the igneous rocks granite. In particular Fluocerite-(La) was first identified in Kazakhstan. The name of this mineral come from the chemical composition it was first discovered with, fluorine and cerium. Like Saturday and Sunday’s structures, today’s is inspired by the space group list project. Fluocerite crystallised in #165 the P-3c1 spacegroup.

Where did the structure come from?

This structure was first determined by Massmann in 1965, it’s CIF file can be found at the American mineral database.

The ‘‘Fascination with crystals and symmetry’ MOOC will be running again from mid October – sign up here to take part! http://bit.ly/crystal_MOOC_2nd

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