Sample
Name
Pellet of Murchison powder (n°1)
Database
Experimentalists
Date
2013-01-01
Provider
IAS, Orsay
Left: mosaic of optical microscope (10x objective) images obtained on Murchison pellet n°1, with the indication of the irradiation conditions performed over diameters of 4 mm; a central area (2 mm in diameter) remained non-irradiated. Right: optical image (10x objective), showing the typical surface roughness and porosity, along with compositional heterogeneity reflected by different contrasts.
Physical characteristics
Thickness
200.0 $\pm$ 100.0 ${\mu}m$
Diameter
13000.0 ${\mu}m$
Mass
0.1 $\pm$ 0.02 $g$
Substrate material
KBr
Substrate comments
KBr window, 2 mm thick, 13 mm diameter. The KBr is used as a substrate to avoid meteorite pellet break.
Comments
Pellet prepared by pressing (7 tons for 10 min) about 100 mg of the original dust (grain size 1–100 µm) on top of a KBr substrate pellet. The KBr is used as a substrate to avoid pellet break. Thickness of the meteorite pellet is large enough (>200 µm) to avoid contribution of KBr to the spectra.
Central non irradiated (virgin) area
Temperature
300.0 $\pm$ 5.0 $K$
Temperature max
300.0 $\pm$ 5.0 $K$
Type
ambient air
Fluid pressure
1.0 $bar$
Pressure
1000.0 $mbar$
Publications
Number
1
Layers
Title
Murchison pellet preparation

Precursors

Matters

Produced sample

Sample
Pellet of Murchison powder (n°1) (this sample)
Processing steps
Step Chronology Date Type Process Changes
#1 before layer formation 2013-01-01 mechanical pressing granular KBr to form the pellet substrate
#2 during layer formation 2013-01-01 mechanical pressing Murchison powder on top of the KBr substrate (7 tons for 10 min)