Molybdenite is used as a lubricant in space craft so I doubt if freezing it
will help much.
Russ Lingenfelter
SDSMT-EMES
501 E. Saint Joseph St.
Rapid City, SD 57701
(605) 394-2380
FAX: (605) 394-5360
-----Original Message-----
From: Support and use of X-ray diffraction instrumentation
[mailto:[log in to unmask]]On Behalf Of Srebri Petrov
Sent: Wednesday, March 03, 2004 3:39 PM
To: [log in to unmask]
Subject: Re: XRD sample prep for Molybdenite
Not sure if it would work, but did you try to freeze molybdenite? Put it in
the freezer's camera overnight and it would become brittle. Then hurry up
with the agate mortar.
Cheers,
Sr. Petrov
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
Dr. Sr. Petrov, PXRD Analyses,
Dept. of Chemistry, University of Toronto
Tel/Fax: (416)-978-1389.
----- Original Message -----
From: "Ian Madsen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 03, 2004 5:14 PM
Subject: XRD sample prep for Molybdenite
> Dear All,
>
> One of my colleagues has posed the following question to me and, with no
specific experience with this mineral, I am unable to offer any help other
than 'the usual' sample preparation advice. Does anyone have specific
experience with molybdenite sample preparation (and analysis) ??
>
>
>
> > -----Original Message-----
> > From: Whittington, Barry (Minerals, Waterford)
> > Sent: Wednesday, 3 March 2004 6:53 PM
> > To: Madsen, Ian (Minerals, Clayton); Scarlett, Nicola (Minerals,
Clayton)
> > Subject: XRD sample prep
> >
> > Hi Ian, Nikki
> > A quick question that will, no doubt, require an involved answer. I
want to analyse a molybdenite sample by XRD, but it is proving 'quite'
difficult to grind to a powder (it tends to smear - no surprise there, since
it's used as a lubricant). Would either of you know how you could prepare
such 'nasty' mineral for XRD analysis? Hand grinding in an agate mortar and
pestle hasn't achieved much (apart from dirtying the agate). I am also
resisting using the microniser until I am sure I will do more than just
dirtying the beast.
> >
> Cheers
>
> o----------------------oo0oo---------------------------o
> Ian Madsen
> Science Adviser - Analytical Science
> CSIRO Minerals
> Box 312
> Clayton South 3169
> Victoria
> AUSTRALIA
>
> Phone +61 3 9545 8785 direct
> +61 3 9545 8500 switch
> 0417 554 935 mobile
> FAX +61 3 9562 8919
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>
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