Name: Leucite KAlSi2O6
Type: Mineral
Class: Silicate
Subclass: Tectosilicate
Particle Size: Coarse
Sample No.: leucite_1
Owner: JHU
Wavelength Range: TIR
Origin: Lake Latium, Italy via the Smithsonian (sample no. NMNHB18734)
Collection Date: N/A
Description:  The sample was a single small crystal, 1 cm in diameter and weighing 1.25 g.  It had good crystal faces and no impurities or alterations were apparent in hand sample or under the microscope.  It did contain what appeared to be fluid inclusions. Particle size was 75-250 micrometers.(Framework Silicates); (Feldspathoid Group) Original ASTER Spectral Library name was jhu.nicolet.mineral.silicate.tectosilicate.coarse.leucit1.spectrum.txt
Mineral:  Leucite KAlSi2O6

Sample No.: leucite.1

XRD Analysis:  Pure leucite according to XRD. (However, infrared 
hydroxyl bands indicate minor alteration to sericite.)

Chemistry:  Microprobe analysis indicated homogeneity within and 
between grains.  An average of 10 analyses indicates pure leucite:

SiO2	55.98
Al2O3	24.07
FeO	0.38
MgO	0.06
CaO	0.02
K2O	20.39
Na2O 	0.19
TiO2	0.06
Cr2O3	0.03
	_____
Total 	101.08
