Paleonet: conodonts onthe SEM: coated or uncoated? [SEC=UNCLASSIFIED]

[Julie Bartley]

John,

 

We have an FEI Quanta 200 (low-vacuum; environmental scope) and we no longer
coat anything. My experience with low-vacuum mode is that for all the
typical magnifications for meso- to microfossils, you should be able to
clean up the specimens and put them straight in the chamber. I haven't done
conodonts specifically, but echinoderm bits, diatoms, radiolarians, and
trilobites all look great uncoated.

 

Julie Bartley

 

Julie K. Bartley

Professor, Geosciences

Callaway Building

University of West Georgia

Carrollton, GA 30118

 

678-839-4054 (o)

678-839-4071 (f)

 

From: paleonet-bounces at nhm.ac.uk [mailto:paleonet-bounces at nhm.ac.uk] On
Behalf Of John.Laurie at ga.gov.au
Sent: Wednesday, April 01, 2009 11:36 PM
To: PaleoNet at nhm.ac.uk
Subject: Paleonet: conodonts onthe SEM: coated or uncoated?
[SEC=UNCLASSIFIED]

 

Dear Paleonetters,

 

We have a new JEOL JSM6490LV (i.e. low vacuum) with standard secondary and
back-scatter detectors as well as robinson cathodoluminescence detectors.
What I need to know is: will I get better image quality for conodonts when
they are gold coated under high vacuum or will uncoated specimens under low
vacuum do just as well?

 

----------------------------------------------------------------- 
Dr John R. Laurie 

Petroleum and Marine Division 

GEOSCIENCE AUSTRALIA 
GPO Box 378         
Canberra ACT 2601       
Australia 
              
Tel: (02) 6249 9412; Fax: (02) 6249 9980 
E-mail: John.Laurie at ga.gov.au 

Street Address: 
Cnr Jerrabomberra Avenue & Hindmarsh Drive 
Symonston ACT 2609 

ABN 80 091 799 039 
----------------------------------------------------------------

 

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