#76

P4₁

Example – Percleveite, (Ce,La,Nd)₂Si₂O₇

Named for Per Theodor Cleve (1840-1905), discoverer of Holmium (Ho) and Thulium (Tm).

Percleveite-(Ce) – A new Lanthanide Disilicate Mineral from Bastnas, Skinnskatteberg, Sweden

Holtstam D , Norrestam R , Andersson U B
European Journal of Mineralogy , 15 (2003) p.725-731

http://webmineral.com/data/Percleveite-(Ce).shtml

CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=07756.cif&down=cif

SiO4 tetrahedra (orange)
La/Ho (green/blue)

3D rotatable model of Percleveite

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