LAP02342 matrix grains (CR) heated at 250°C under vacuum | GhoSST | SSHADE

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Sample

Name: LAP02342 matrix grains (CR) heated at 250°C under vacuum

Owner of sample

Database

GhoSST

Experimentalists

Trygve Prestgard

Origin of sample

Date: 2021-01-01
Provider: IPAG
Parent sample: LAP02342 matrix grains (CR) on diamond (vacuum, Tamb)

Physical characteristics

Thickness: 15.0 $\pm$ 5.0 ${\mu}m$
Diameter: 40.0 ${\mu}m$
Substrate material: diamond window
Substrate comments: diamond window of 3.5mm diameter
Comments: matrix grains manually selected under binocular, pressed on diamond window and progressively heated under vacuum

Sample environment: Temperature

Temperature: 250.0 $\pm$ 5.0 $^{\circ}C$
Temperature max: 260.0 $\pm$ 5.0 $^{\circ}C$
Time at Tmax: 3600.0 $s$

Sample environment: Fluid

Type: vacuum
Fluid pressure: 2.5e-06 $\pm$ 5.0e-07 $mbar$
Comments: sample put in a cell enabling acquisition under primary or secondary dynamic vacuum (from $10^{-4}$ mbar down to $10^{-7}$ mbar)

Documentation and publication

Publications

Prestgard et al., 2023, Meteorit. Planet. Sci., 58, 1117 - 1148

Layers in sample

Number

1

Layers

Layer #1 , 15.0 ${\mu}m$

Sample processings

Title

heating of the pressed grains

Precursors

Samples

LAP02342 matrix grains (CR) on diamond (vacuum, Tamb)

Produced sample

Sample

LAP02342 matrix grains (CR) heated at 250°C under vacuum (this sample)

Processing steps

Step	Chronology	Date	Type	Process	Changes
#1	on parent sample	2021-01-01	thermal	heating at 250°C under vacuum in an environmental cell	partial reduction of the amount of adsorbed $H_2O$

Comments

heating in order to remove adsorbed water on the matrix grains