Trace element concentrations by micro-PIXE, cathodoluminescence (CL) emissi
on spectra and electron spin resonance (ESR) spectra of Mn2+ in "Iceland sp
ar" calcite have been measured. The average rare earth elements (REE) abund
ances of the Iceland spar calcite revealed a concave shape with positive Eu
and Tb anomalies. All samples show comparable average REE abundances compa
red to average chondrites standard. The REE signal in hydrothermal solution
seems to be similar for the different locations and age of formation altho
ugh the absolute REE concentration in the solution was certainly different.
The CL-properties of investigated Iceland spar varied from orange to green
. The orange luminescence is based on Mn2+ in Ca-position of calcite while
this uncommon green luminescence is most likely attributed to UO22+ complex
ions associated with electron-hole centres. (C) 2001 Elsevier Science B.V.
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