Sample Description USGS Spectral Library Version 7

USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
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TITLE: Meionite WS700 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: WS700.HLsp

MINERAL_TYPE: Tectosilicate

MINERAL: Meionite (Scapolite group)

FORMULA: Na4Al3Si9O24(Cl,OH)/Ca4Al6Si6O24(CO3,SO4)

FORMULA_HTML: Na₄Al₃Si₉O₂₄(Cl,OH)/Ca ₄Al₆Si₆O₂₄(CO₃,SO₄)

COLLECTION_LOCALITY: Otter Lake, Quebec Canada

ORIGINAL_DONOR: Ward Science Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Scapolite solid solution series (marialite-wernerite-meionite) end member. Metamorphic mineral with composition suggestive of feldspars.

For samples marked WS700.HL, the HL stands for Heavy Liquid separation.

IMAGE_OF_SAMPLE:
NO PHOTO

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Scapolite + analcime + other(m) (Norma Vergo)

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: EM # XRF, EPMA, ICP(Trace), WChem

COMPOSITION
KEYWORD Oxide
ASCII Amount Weight
Percent, % Oxide
html

COMPOSITION: SiO2 52.5600 wt% SiO₂

COMPOSITION: TiO2 0.0220 wt% TiO₂

COMPOSITION: Al2O3 24.7100 wt% Al₂O₃

COMPOSITION: FeO 0.0720 wt% FeO

COMPOSITION: MnO 0.0360 wt% MnO

COMPOSITION: MgO 0.0200 wt% MgO

COMPOSITION: CaO 12.5800 wt% CaO

COMPOSITION: Na2O 5.5320 wt% Na₂O

COMPOSITION: K2O 0.7760 wt% K₂O

COMPOSITION: Cl 1.7520 wt% Cl

COMPOSITION: F 0.0140 wt% F

COMPOSITION: SO3 1.1880 wt% SO₃

COMPOSITION: CO2 0.2000 wt% CO₂

COMPOSITION: Total 99.4620 wt%

COMPOSITION: O=Cl,F,S 0.4012 wt% #correction for Cl, F, S

COMPOSITION: New Total 99.0608 wt%

COMPOSITION KEYWORD	Oxide ASCII	Amount	Weight Percent, %	Oxide html
COMPOSITION:	SiO2	52.5600	wt%	SiO₂
COMPOSITION:	TiO2	0.0220	wt%	TiO₂
COMPOSITION:	Al2O3	24.7100	wt%	Al₂O₃
COMPOSITION:	FeO	0.0720	wt%	FeO
COMPOSITION:	MnO	0.0360	wt%	MnO
COMPOSITION:	MgO	0.0200	wt%	MgO
COMPOSITION:	CaO	12.5800	wt%	CaO
COMPOSITION:	Na2O	5.5320	wt%	Na₂O
COMPOSITION:	K2O	0.7760	wt%	K₂O
COMPOSITION:	Cl	1.7520	wt%	Cl
COMPOSITION:	F	0.0140	wt%	F
COMPOSITION:	SO3	1.1880	wt%	SO₃
COMPOSITION:	CO2	0.2000	wt%	CO₂
COMPOSITION:	Total	99.4620	wt%
COMPOSITION:	O=Cl,F,S	0.4012	wt%	#correction for Cl, F, S
COMPOSITION:	New Total	99.0608	wt%

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

These values may be suspect because acid dissolution did not remove all CO₃.

Average of 5 spots.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Presence of analcime appear to cause absorptions at 1.42µ region.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1c2_3_4_ # WS700.HLsp # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns