Anorthite CL/OM measurement, Moore & Karakus 1994

Reference	Moore R. & Karakus M. (1994). Cathodoluminescence microscopy, a technique uniquely suited to the solution of refractory wear problems. Proc. of the International Ceramics Conference (Austceram'94), 925-940.
Material	Anorthite [ CaAl₂Si₂O₈ ] Anorthite specimen from the type locality at Somma-Vesuvius Complex, Naples Province, Campania, Italy. Size: 6.9 x 4.1 x 3.8 cm © 2010 Rob Lavinsky, iRocks.com, CC-BY-SA-3.0
Specimen temperature	Ambient
Technique	Cathodoluminescence (CL), using an optical microscope
Lines	Mn²⁺ 550 — 565 nm, 550 — 560 nm, Sm³⁺ 598 nm, 643 nm

Nominal composition of Anorthite [ CaAl₂Si₂O₈ ].
Element	Atoms	At%	Wt%
Ca	1	7.69	14.4
Al	2	15.4	19.4
Si	2	15.4	20.2
O	8	61.5	46