Name: Acmite NaFe+3 Si2O6
Type: Mineral
Class: Silicate
Subclass: Inosilicate
Particle Size: Fine
Sample No.: acmite_1
Owner: JHU
Wavelength Range: TIR
Origin: Narsarsuk, Greenland via the Smithsonian (sample no. NMNH95506). 
Collection Date: N/A
Description: The sample consisted of black radiating acicular crystals with some contaminating brown coating, which dissolved in dilute HCl.  Sample size was 2 cm x 2 cm x 1 cm.  Contamination was largely eliminated by hand picking and the little remaining was dissolved with dilute HCl. Particle size was less than 2 Micrometers.(Pyroxene Group - single chain) Original ASTER Spectral Library name was jhu.nicolet.mineral.silicate.inosilicate.powder.acmite1.spectrum.txt
Sample No.: Acmite.1

XRD Analysis:  Pure acmite.

Chemistry:  Microprobe analysis showed a small (ca. 1 wt %) 
variability in FeO, CaO, MgO and TiO2 within grains.  An average of 
15 analyses indicates close to end member composition:

SiO2	52.68
Al2O3	0.35
FeO	28.87
MgO	0.55
CaO	1.28
K2O	0.02
Na2O	12.98
TiO2	0.65
MnO	0.65
	_____
Total 	98.01
