Sample
Name
IOM from particle A0108_10
Date
2022-01-01
Provider
JAXA - remaining sample given back in June 2022
Parent sample
A0108_10
Substrate material
synthetic type IIa diamond windows
Substrate comments
between two 3 x 0.5 mm diamond windows
Temperature
22.0 $\pm$ 2.0 $^{\circ}C$
Temperature max
22.0 $\pm$ 2.0 $^{\circ}C$
Comments
IOM sample stored in dessicator under vacuum
Type
ambient air
Fluid temperature
22.0 $^{\circ}C$
Fluid pressure
1.0 $atm$
Title
selection of the grains

Precursors

Matters

Produced sample

Materials
Processing steps
Step Chronology Date Type Process Changes
#1 before layer formation 2022-01-01 chemical Ultrapure water (Milli-Q water, 18.2 M$\omega$) and CH3OH:CH3Cl (2/1 v/v) leaching sequences were applied to extract soluble organic molecules (SOM) removal of soluble organic molecules
#2 before layer formation 2022-01-01 chemical HCl 6N was used to remove carbonates, sulfides (pyrrhotite and pentlandite) and other minerals, as one step of 2 h, followed by ultrapure water rinsing and a second step overnight. removal of minerals
#3 before layer formation 2022-01-01 chemical A similar sequence with HF(48%):HCl(37%) (2/1 v/v) was run, followed by a short HCl 6N sequence (2 h), to remove any cations that might subsequently react with F- to form insoluble fluorides. removal of cations
#4 before layer formation 2022-01-01 chemical The sample was rinsed again with ultrapure water and CH3OH:CH3Cl (2/1 v/v), for removing encaged free molecules. removing of free molecules
#5 before layer formation 2022-01-01 thermal After having purged the remaining reagents, the sample holder was dismounted and the filter was dried. removal of reagents and water => dried IOM
#6 during layer formation 2022-01-01 mechanical Grains pressed between two diamond windows IOM grains crushed down to a thickness of about 10 microns