Name: Andalusite Al2SiO5
Type: Mineral
Class: Silicate
Subclass: Nesosilicate
Particle Size: Coarse
Sample No.: andalusite_1
Owner: JHU
Wavelength Range: TIR
Origin: Sample from St. Theresa, Espirito Santo, Brazil via Smithsonian(sample no. NMNH R17898). 
Collection Date: N/A
Description:  Sample was composed of two crystals, one clear and one pale pink. Both appeared pure, both 1 cm x 1 cm x 5 cm. Examination under a petrographic microscope indicated pure and clean samples. Sample grains chosen for microprobe analysis were clear, but with poor polish in part. Particle size was 74-250 Micrometers.(Isolated tetrahedra) (Al2SiO5 Group) Original ASTER Spectral Library name was jhu.nicolet.mineral.silicate.nesosilicate.coarse.andalu1.spectrum.txt
Mineral:  Andalusite Al2SiO5

Sample No.: andalus.1

XRD Analysis:  Pure andalusite.

Chemistry:  Microprobe analysis showed the sample to be 
homogeneous within and between grains.  An average of 10 analyses, 
indicating close to end member composition, is:

SiO2 	37.19
Al2O3	63.62
FeO 	0.26
MgO	0.06
CaO 	0.02
K2O	0.01
Na2O	0.02
TiO2	0.03
MnO 	0.01
	_____
Total 	101.22
