Meteroite sample- the one that got away
Had a nice one picked out, but only made ot as far as the freight elevator......
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Re: Ore Sample 5. Iron, Yttrium, Cerium + trace R.E.
Yes Charles Ore-5, and the SDDCAP Jig: 
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Yes it is monitored and controlled precisely, the one being used today is programed to 219K (~ -65F)
Geo
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On 2019/10/07 12:50 PM, Randall Buck wrote:
Hi Geo,
Do you know what temperature the cooled SDD is set to operate at?
Randall
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Hi Geo,
Do you know what temperature the cooled SDD is set to operate at?
Randall
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Hi AWally, etching not needed for XRF but is needed to classify the meteorite.
The Widmanst?tten pattern is fascinating, no?
Geo
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On 2019/10/06 11:08 PM, AnotherWally wrote:
On 10/6/19 6:49 PM, GEOelectronics@... wrote:
Almost pure iron and nickel:
The photo nicely shows grain, did you etch the surface after polishing?? I have been thinking about doing that with some specimens I have. AnotherWally --? AnotherWally anotherwally@...
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On 10/6/19 6:49 PM, GEOelectronics@... wrote: Almost pure iron and nickel: The photo nicely shows grain, did you etch the surface after polishing?? I have been thinking about doing that with some specimens I have. AnotherWally -- AnotherWally anotherwally@...
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Almost pure iron and nickel: 
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Re: XRF with SI-PIN sensor or: A new era of precision in the Home Lab XRF and low energy X-Ray studies.
Most pure elements Ca thru Bi I have already, some can be improved upon.
My Promethium is gone now and my iridium is suspect, will redo it and all the elements in the article with Si-PIN for an updated edition (already did them with SDD back in Las Vegas):
What I need to start up now is minerals to test and challenge my Si-PIN system compared to the SDD from 2014.
My pellet presses are 2 Ton, vacuumable,? for FT-IR really, they make small 5mm pellets, Have 3 of those, want to trade for some 25 and 40mm XRF types
Geo
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On 2019/10/06 03:58 PM, Dude wrote:
Geo,
This is just doing a real quick look at what I have. Most are 99%+
Nd Oxide
Didymium Oxide
Nb oxide and Nb powder
La Oxide
La Sr Fe Co oxide mix
La Sr Mn Oxide mix
La F3
Hf Metal and Hf Oxide (metal is dangerouis)
Sm Oxide
Ce Oxide
Sc Oxide
Cs Cl
Gd Oxide
Co Oxide
Ta Oxide
Y oxide, Y metal
A lot of base metal oxides Mn, Zn, Ti, V Li, Fe Al, Y etc. Also nitrates and chlorides. PGM's
I also have plenty of the REEs and Coltan in rock matrix which really complicates the spectra
These are good to build a calibration curve with to do quantification
I use xrf cups with a powder or soils in them but I'm looking to get a pellet press set up. ?A 1/8" disk seems pretty thin for a 50 keV beam I'd think. What are you using for a pellet press, how many tons?
Dud
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From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Sunday, October 6, 2019 12:24 PM
To: [email protected]
Subject: Re: [XRF] XRF with SI-PIN sensor or: A new era of precision in the Home Lab XRF and low energy X-Ray studies.
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Dudley are you seeing pictures OK now?
On the samples, 5-10 grams is enough probably.
For XRF I use 1" X 1" "stamps" and they are ~ 1/8".
Geo
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Re: XRF with SI-PIN sensor or: A new era of precision in the Home Lab XRF and low energy X-Ray studies.
Geo,
This is just doing a real quick look at what I have. Most are 99%+
Nd Oxide
Didymium Oxide
Nb oxide and Nb powder
La Oxide
La Sr Fe Co oxide mix
La Sr Mn Oxide mix
La F3
Hf Metal and Hf Oxide (metal is dangerouis)
Sm Oxide
Ce Oxide
Sc Oxide
Cs Cl
Gd Oxide
Co Oxide
Ta Oxide
Y oxide, Y metal
A lot of base metal oxides Mn, Zn, Ti, V Li, Fe Al, Y etc. Also nitrates
and chlorides. PGM’s
I also have plenty of the REEs and Coltan in rock matrix which
really complicates the spectra
These are good to build a calibration curve with to do quantification
I use xrf cups with a powder or soils in them but I’m looking to
get a pellet press set up. ?A 1/8” disk seems pretty thin for a 50 keV beam I’d
think. What are you using for a pellet press, how many tons?
Dud
?
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From: [email protected]
[mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Sunday, October 6, 2019 12:24 PM
To: [email protected]
Subject: Re: [XRF] XRF with SI-PIN sensor or: A new era of precision in
the Home Lab XRF and low energy X-Ray studies.
?
Dudley are you seeing pictures OK now?
On the samples, 5-10 grams is enough probably.
For XRF I use 1" X 1" "stamps" and they are ~ 1/8".
Geo
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Re: Moh's Hardness Scale Test Kit, and XRF of its contents. Metal Pick Point #9
I think wee see W (tungsten) clearly, and Co (cobalt). From this we assume WC-Co (tungsten carbide / cobalt).
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We don't see carbon with XRF (Mg @ 1.25 is the practical? limit for Si-PIN and a
little lower for SDD (Silicon Drift Detectors).
Geo
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Moh's Hardness Scale Test Kit, and XRF of its contents.
These test kits are available in different forms but they all work in the same way. A pointed pick is used
to try to scratch the mineral or object being tested. Starting with #1, increasing numbers are tried until one does scratch the test material, indicating the harness of the material is less than the point that does actually scratch
it but more than the previous point that did not.
The set I use and take on field trips came in a sturdy wooden case as shown. It came from a mining/prospecting outfitter that used to be in business in Las Vegas, located right next to my favorite Mexican restaurant.
Some of these picks make excellent XRF targets, so in the following posts I will attach XRF scans of them starting with #9 and my amateur attempt to identify the materials that make them.
Have fun,
Geo>K0FF
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Re: XRF with SI-PIN sensor or: A new era of precision in the Home Lab XRF and low energy X-Ray studies.
Dudley are you seeing pictures OK now?
On the samples, 5-10 grams is enough probably.
For XRF I use 1" X 1" "stamps" and they are ~ 1/8".
Geo
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Re: XRF with SI-PIN sensor or: A new era of precision in the Home Lab XRF and low energy X-Ray studies.
Geo,
I have a lot of reagent grade oxides of the rare earths and
metals that would be a lot easier to pelletize. What elements do you need and
how many grams or pounds are required?
Dud
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From: [email protected]
[mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Tuesday, October 1, 2019 11:15 AM
To: [email protected]
Subject: Re: [XRF] XRF with SI-PIN sensor or: A new era of precision in
the Home Lab XRF and low energy X-Ray studies.
?
?
Yes
especially anything US quarter sized or so that is of no value, I need at least
a few that size to powder in a mill? and press into pellets.
On
2019/10/01 11:51 AM, Charles David Young wrote:
I
am on the site now and still don't see images in your message.
So you want me to send you some mineral samples for your Si-PIN?
Charles
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Ore Sample 5. Iron, Yttrium, Cerium + trace R.E.
Pretty clean. 
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Yes I have all the data on its own little notebook computer now, and also have some photos of the setup. There were at times 3 MCAs running at one time, in the same setup, each with a different probe,
Do you have DppMCA running? It is freeware on AMPTEK site, and seems to be the
same version as we used in '14.
The data files can be emailed? to you, no problem I would appreciate your input. Do you still have the report? If not I do still, in a MS-WORD document.
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On 2019/10/05 01:11 PM, Dude wrote:
Geo,
You can still get a Sm K if its concentrated so I set the upper to 50. ?I relooked at some of the shots we did in Las Vegas but the file only reas a .X.MCA. Do you have the notes from what these shots were? The only one labeled was the Harding. Also the Calibrate and Analyze function works on my version and will id the peaks after? you do a peak search. I forgot how nice that Amptek program is.
Dud
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?
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Yes it does explain the @59.5. These scans were made in Feb 2014. Since then I've learned to set the gain and now the whole screen only shows 0-45 keV.
That won't cover the all R.E.'s K shell X-Rays but about halfway through the Lanthanides, you are switching to L shell identification, and eventually L and M shell anyway.
Geo
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Geo,
You can still get a Sm K if its concentrated so I set the upper
to 50. ?I relooked at some of the shots we did in Las Vegas but the file only
reas a .X.MCA. Do you have the notes from what these shots were? The only one
labeled was the Harding. Also the Calibrate and Analyze function works on my version
and will id the peaks after? you do a peak search. I forgot how nice that
Amptek program is.
Dud
?
?
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From: [email protected]
[mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Saturday, October 5, 2019 10:32 AM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF
?
Yes it does explain the @59.5. These scans were made in Feb
2014. Since then I've learned to set the gain and now the whole screen only
shows 0-45 keV.
That won't cover the all R.E.'s K shell X-Rays but about halfway through the
Lanthanides, you are switching to L shell identification, and eventually L and
M shell anyway.
Geo
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Yes it does explain the @59.5. These scans were made in Feb 2014. Since then I've learned to set the gain and now the whole screen only shows 0-45 keV.
That won't cover the all R.E.'s K shell X-Rays but about halfway through the Lanthanides, you are switching to L shell identification, and eventually L and M shell anyway.
Geo
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That would explain the last peak at 59
Dud
?
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From: [email protected]
[mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Friday, October 4, 2019 5:15 PM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF
?
Beam
current = 0.0 uA (8 pellet SDD CAP was excitation source).
Time - 3600 seconds.
Many other runs were done on same rock, with different times, excitation source
and probes.
These are the setup parameters for the run shown:
RESC=?; Reset Configuration
CLCK=80; 20MHz/80MHz
TPEA=11.200; Peaking Time
GAIF=1.1064; Fine Gain
GAIN=19.663; Total Gain (Analog * Fine)
RESL=3276; Detector Reset Lockout
TFLA=0.400; Flat Top
TPFA=100; Fast Channel Peaking Time
PURE=ON; PUR Interval On/Off
RTDE=OFF; RTD On/Off
MCAS=NORM; MCA Source
MCAC=1024; MCA/MCS Channels
SOFF=OFF; Set Spectrum Offset
AINP=POS; Analog Input Pos/Neg
INOF=DEF; Input Offset
GAIA=10; Analog Gain Index
CUSP=0; Non-Trapezoidal Shaping
PDMD=NORM; Peak Detect Mode (Min/Max)
THSL=2.978; Slow Threshold
TLLD=OFF; LLD Threshold
THFA=8.06; Fast Threshold
DACO=OFF; DAC Output
DACF=0; DAC Offset
RTDS=0; RTD Sensitivity
RTDT=0.00; RTD Threshold
BLRM=1; BLR Mode
BLRD=3; BLR Down Correction
BLRU=0; BLR Up Correction
GATE=OFF; Gate Control
AUO1=ICR; AUX_OUT Selection
PRET=3600.0; Preset Time
PRER=OFF; Preset Real Time
PREC=OFF; Preset Counts
PRCL=0; Preset Counts Low Threshold
PRCH=0; Preset Counts High Threshold
HVSE=-135; HV Set
TECS=225; TEC Set
PAPS=ON; Preamp 8.5/5 (N/A)
SCOE=RI; Scope Trigger Edge
SCOT=87; Scope Trigger Position
SCOG=1; Digital Scope Gain
MCSL=0; MCS Low Threshold
MCSH=0; MCS High Threshold
MCST=0.00; MCS Timebase
AUO2=ICR; AUX_OUT2 Selection
TPMO=OFF; Test Pulser On/Off
GPED=FA; G.P. Counter Edge
GPIN=AUX1; G.P. Counter Input
GPME=OFF; G.P. Counter Uses MCA_EN?
GPGA=OFF; G.P. Counter Uses GATE?
GPMC=OFF; G.P. Counter Cleared With MCA Counters?
MCAE=OFF; MCA/MCS Enable
BOOT=ON; Turn Supplies On/Off At Power Up
On
2019/10/04 06:41 PM, Dude wrote:
Try putting the plot for the Y scale in log space, it should
?help sort out the big from the small.? What was your live time and
beam current on this shot? ?
Dud
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Same sample as first post, same
scan and data, but with the gain turned up to bring up lesser, but still
interesting peak-pairs.
 Geo,
Now we can pick out Ce and Nd pretty easily and with some detective work,,
possibly smaller quantities of? La, Ca and Ni.
Have fun
Geo>K0FF
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