Information on Standards and Reference Materials (S-RM)

Kakanui Augite (silicate) - ID USNM 122142

First entry: 01/02/16 || Last update: 27/07/21 || Status: pending

General information
Mineral class Sub-class Group Species	Silicate Inosilicate single chains Clinopyroxene Augite
Synthetic?	no
Formula Standard element(s)	(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 Si Mg Ca
Origin, rock type...	Kakanui, New Zealand

No images found...

(*) Recommended analysis.

Analysis 1
See analysis 2 for recommended analysis
Reference	B. Wiik, Finland Geologic Survey
Analysis type	unknown

Wt-% oxide		Wt-% element		Atom: N/A
50.7300 0.7400 7.8600 3.4500 16.6500 0.1300 15.8200 1.2700 3.6900 0.0400	SiO2 TiO2 Al2O3 FeO MgO MnO CaO Na2O Fe2O3 H2O	23.7133 0.4435 4.1600 2.6817 10.0406 0.1007 11.3065 0.9422 2.5809 0.0045 44.4062	Si Ti Al Fe Mg Mn Ca Na Fe3+ H O
100.380		100.380

Analysis 2
Recommended analysis
Reference	Jarosewich et al.
Analysis type	unknown
Analysis comment	The original published composition was apparently done in Finland (Jarosewich et al , 1980). The preferred working value above was distributed by Gene Jarosewich. We do not know when the sample was reanalyzed.

Wt-% oxide		Wt-% element		Atomic
50.7300 8.7300 1.0800 5.3701 16.6499 15.8200 1.2700 0.7400 0.1300	SiO2 Al2O3 Fe2O3 FeO MgO CaO Na2O TiO2 MnO	23.7133 4.6204 0.7554 4.1742 10.0406 11.3065 0.9422 0.4435 0.1007 44.4233	Si Al Fe3+ Fe Mg Ca Na Ti Mn O	1.82444 0.37003 0.02923 0.16151 0.89266 0.60960 0.08856 0.02002 0.00396 6.00464
100.520		100.520		10.005

Common impurities: Calcite and barite; Rare impurities: Grains with lower Na, Al and higher Fe, Mg, Ca

Jarosewich, E., Nelen, J. A., and Norberg, J. A. (1980) Reference Samples for Electron Microprobe Analysis. Geostandards Newsletter 4, p. 43-47
Mason, B. (1966) Pyrope, augite and hornblende from Kakanui, New Zealand. J. Geol. Geophys. 9 (4), p. 474- 480
Mason, B. and Allen, R.O. (1973) Minor and trace elements in augite, hornblende and pyrope megacrysts from Kakanui, New Zealand
New Zealand Journal of Geology and Geophysics, 16(4), p. 935-947

Smithsonian Institution
PO Box 37012
SI Building, Room 153, MRC 010
Washington, D.C. 20013-7012
USA
https://mineralsciences.si.edu/facilities/standards.htm
Material: mineral (size: 0.42 mm - 0.25 mm, 0.3 mm - 0.25 mm, 0.18 mm - 0.13 mm, or > 0.3 mm)
https://naturalhistory.si.edu/research/mineral-sciences/collections-overview/reference-materials/smithsonian-microbeam-standards