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Rock Sample 1

 EnviroESCA sample plate with rock sample

Small rock on an EnviroESCA sample plate. The sample was analysed without any pretreatment, drying, cleaning procedure, electrical contacting, or glueing.

Rock sample in EnviroESCA

Rock underneath the analyzer nozzle at a working distance of 0.3mm.
The image was recorded with one of the three digital microscopes at the EnviroESCAs Analysis Module. The metal pipe coming from the lower left corner allows for dosing of gases directly onto the analyzed region of the sample.
   
 XPS spectrum of a rock sample recorded with EnviroESCA

After evacuating the Sample Environment to 1mbar a survey spectrum was measured.
As the Rock is insulating it would charge up upon x-ray iradiation und HV or UHV conditions. Providing a 1mbar atmosphere of air results in an Environmental Charge Compensation.

 XPS spectrum of a rock sample recorded with EnviroESCA
The above shown detail of the survey spectrum between 0 and 200 eV binding energy clearly shows signals from Silicon, Aluminium, Iron and Calcium on the surface of the Rock.
 XPS spectrum of a rock sample recorded with EnviroESCA
In the detail of the survey spectrum between 270 and 470 eV binding energy contributions of Calcium, Carbon and a Nitrogen species are present.
 XPS spectrum of a rock sample recorded with EnviroESCA
The above shown detail spectrum between 500 and 800 eV binding energy is dominated by the Oxygen 1s peak. Furthermore, the Iron 2p1/2 and 2p 3/2 peaks are observed.



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