Name: Labradorite (Na,Ca)Al(Al,Si)Si2O8
Type: Mineral
Class: Silicate
Subclass: Tectosilicate
Particle Size: Solid
Sample No.: labrador_1
Owner: JHU
Wavelength Range: TIR
Origin: Lake County, Oregon, acquired from the Smithsonian (sampleno. NMNH 115500) via Dave Stewart, USGS
Collection Date: N/A
Description: The sample consisted of a 2 cm x 1 cm x 0.2 cm, 0.536 g portion, of a single transparent crystal.  The fragment seemed to have been sawn on one side.  A very, very small amount of iron oxide stain could be seen on the surface of the fragment and still less on the inside.  No impurities were detected under the microscope. Sample had Fractured Surface.(Framework Silicates); (Feldspar Group) Original ASTER Spectral Library name was jhu.nicolet.mineral.silicate.tectosilicate.solid.labrad1.spectrum.txt
Mineral:  Labradorite (Na,Ca)Al(Al,Si)Si2O8

Sample No.: labrador.1

XRD Analysis:  Pure labradorite.

Chemistry:  Sample analyzed and described in Stewart, D.B., Walker, 
G.W., Wright, T.L., and Fahey, J.J., 1966, Physical properties of calcic 
labradorite from Lake County, Oregon:  American Mineralogist, v. 51, 
p. 177-197.

SiO2	51.42
TiO2	0.04
Al2O3	30.76
Fe2O3	0.24
FeO	0.17
MnO	not reported
MgO	0.05
CaO	13.42
Na2O	3.52
K2O	0.23
H2O	0.04
	_____
Total	99.89
