Si K edge XAS measurements
Sample prep and measurements details
Lab book transcription for February 2009 Si K edge experiment
Sample list
formula |
common name |
Source |
in stock? |
Beamline |
Si powder1 |
|
Alfa-Aeser Stock #44384 |
yes |
X15b |
SiO2 |
silica |
unknown |
yes |
X15b |
SiO2 |
quartz |
H-122838 |
yes |
X15b |
SiO |
silicon monoxide |
Aldritch 262951-50G |
yes2 |
X15b |
Si3N2 |
silicon nitride |
Alfa-Aeser Stock #14704 |
yes |
X15b |
FeSi |
iron silicide |
Alfa-Aeser Stock #14019 |
yes |
X15b |
SiC |
silicon carbide |
Alfa-Aeser Stock #43332 |
yes |
X15b |
Mg2SiO4 |
Forsterite |
unknown |
yes |
X15b |
Fe2SiO4 |
Fayalite |
Alfa-Aeser stock #44278 |
yes |
X15b |
MgSiO3 |
enstatite |
Alfa-Aeser, stock #42638 |
yes |
X15b |
MgSiO3 |
enstatite (colorless) |
H-132059 |
yes |
X15b |
MgSiO3 |
enstatite |
Indarch meteorite3 |
yes |
X15b |
(Mg,Fe)SiO3 |
enstatite (black) |
H-130424 |
yes |
X15b |
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2⋅nH2O |
montmorillonite |
H-142599 |
yes |
X15b |
Ca0.5(Si7Al0.8Fe0.2)(Fe3.5Al0.4Mg0.1)O20(OH)4 |
nontronite |
H-102634 |
yes |
X15b |
(Mg,Fe)3Si2O5(OH)4 |
antigorite |
H-126645 |
yes |
X15b |
Mg3(Si2O5)(OH)4 |
chrysotile |
H-98898 |
yes |
X15b |
(Mg,Fe)2SiO4 |
forsterite/olivine |
H-88333B |
yes |
X15b |
- Notes
- 1. partially oxidized
See this paper which doubts commercial SiO phase purity, J. Non-Crystalline Solids 204:2, (1996) 202-203
See http://www.mindat.org/loc-20446.html and http://www.meteoritestudies.com/protected_INDARCH.HTM and this Nature article. Googling for indarch returns lots of hits.
- Other minerals
* Andalusite, kyanite, and sillimanite are naturally occurring aluminosilicate minerals that have the composition Al2SiO5.
Garnets are nesosilicates having the general formula X3Y2(SiO4)3. The X site is usually occupied by divalent cations (Ca2+, Mg2+, Fe2+) and the Y site by trivalent cations (Al3+, Fe3+, Cr3+) in an octahedral/tetrahedral framework with [SiO4]4− occupying the tetrahedra.