Insoluble in residual acid, shiny powder rock sediment reacts with boiling water.
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kurtak
Well-known member
One more side note; - the yellow/orange/golden colors you are seeing in your rocks is NOT gold --- it is iron oxide other wise know as rust - it is just rust tied up in the crystal structure of the rock
Kurt
Yes. Yes, I do.We don't even need to guess - it is serpentine - but you know that
Kurt
Voici le résultat du test XRF que le laboratoire m'a donné
Here is the result of the XRF test that the laboratory gave me
Edit by Moderator to incorporate English translation
Additionally I have deleted the double postings which is against the forum rules.
DO NOT DO THIS AGAIN
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There is something strange with these numbers, I did not think Chlorine could be detected by XRF
I gave this sample to the laboratory
with hydrochloric acid and nitric acid
A long time
This means that there should be no iron in this powder
and dissolves in acid
Am I wrong because the xrf test has a lot of iron
I have already separated the photo of the sample powder
It is completely silver
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There can be insoluble Iron Hydroxides
You say iron (II) hydroxide. Is
The density of iron hydroxide is 3.4 grams per cubic centimeter. how is it
But the powder sample I measured myself has a density of 9.88 grams per cubic centimeter
This is not consistent with the result of the %Iron test of 87.62% from the xrf test. What do you recommend?
On the other hand, in my sample, there are very shiny particles that do not look similar to any of the artifacts detected in the test.
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You need to answer this.
You were the one in contact with the lab.
And XRF is not a good assay for ores.
It can be an indicator that you need a proper assay.
What is your material and how did you process it?
In the laboratories of my country, fraud is very possible. I put the puzzles together, but something is not right. You have also reached this conclusion.
This is my rock, it was corroded and I put it in hydrochloric acid and nitric acid, aqua regia, this powder remained and thus no longer reacts with acid.
A feeling inside me says that maybe I am on the side of rhodium
What is the rhodium test, what are the steps of the test solution, I could not find it on the internet
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This is most likely as said earlier Serpentine, which in turn contains Asbestos.
Asbestos is a very potent carcinogen so it should not be dried at all.
All powders should always be kept wet.
To verify Rhodium you need to have a NiS assay and they are expensive.
Martijn
Well-known member
Or the XRF is wrong. a lot of "Facts" are just misinterpretations.
That does not look like a rock with 80% iron to me. crusching it would have been very hard.
looks like mica and chalcopyrite, maybe calaverite, maybe something completely different.
have it assayed!
edited:
Completely silver(tested and verified?) or silvery shiny?
It think you can compare this XRF test as measuring temperature of the ocean with a tape measure under tapwater in your sink.
kurtak
Well-known member
Per the bold print in the above quotes --- you have already been told exactly what those shiny silvery particles are
They are the fine asbestos fibers in your serpentine rock - just like everything yellow is not gold - everything silver looking is not silver - in this case the silver looking solids are ABSOLUTELY asbestos
Serpentine is a rock that has asbestos in it - asbestos WILL NOT dissolve in the acids you are using
There are NO PMs (Precious Metals) in your serpentine rock(s)
SOOOO - STOP what you are doing !!!!
You are doing nothing other then wasting you time - wasting chemicals - AND - creating TOXIC acidic solutions as well as concentrating the TOXIC asbestos
Kurt
kurtak
Well-known member
How can calcium, potassium and iron hydroxide (II) in this sample
Dissolve completely in acid, Aqua Regia stops somewhere. What kind of acid can do this at high speed, I have to consider that it does not interfere with precipitants when I want to deposit platinum family metals.
I saw two examples of calcium and potassium react with water in the reactivity table and iron (II) hydroxide reacts with acid.
Dissolve completely in acid, Aqua Regia stops somewhere. What kind of acid can do this at high speed, I have to consider that it does not interfere with precipitants when I want to deposit platinum family metals.
I saw two examples of calcium and potassium react with water in the reactivity table and iron (II) hydroxide reacts with acid.
I'm puzzled.
Do you even reed the replies to your posts?
Most likely you have Serpentine and it is a very dangerous Rock since it contains Asbestos.
Asbestos is a Magnesium/Iron/metal Silicate that is insoluble in acids.
But it will cause Cancer if you breath the dust.
So it is plausible for the result for the XRF.
The XRF do not show any values so why are you throwing your efforts and acids into it when it sooner or later will kill you?
Ther is absolutely no reason to believe there is PGMs in that rock unless an assay says so.
Then many of us will have learned something new.
Hydrogen Peroxide will reduce the amount of Nitric needed since it will help regenerate the Nitric, it will also dissolve precious metals with HCl without Nitric.
If you remember, when I took the stannous chloride test, it didn't show anything. I was disappointed that there was something in the acid.
I was hoping for the remaining sediment from the shiny stone
Metals of the platinum family
Because I had read somewhere that these do not dissolve in Aqua regia
I was focused on them and had no hope of anything being in the acid
I took it to the test, only one thing caught my attention, I had 2.15% titanium
In one gram sample, I doubted that it contains titanium
But it doesn't have precious metals anymore.
Today, after 20 days, I went to the warehouse and saw Aqua regia acid
There is no trace of shiny components anymore, 80% of them were dissolved
I made a new stannous chloride solution and tried the test drop
I quickly saw the color change, it became very dark brown
I remembered a friend who said that the metals of the platinum family
They do not dissolve quickly in aqua regia and it takes time
what do you think
Add precipitant to acid
Which order is better?
Dark brown can be anything.
But unlikely any precious metal, it is often considered a false positive.
Gold and Silver is rare but compared to PGMs they are quite common.
Most oxides and silicates do not dissolve in acids nor alkalis.
PGMs do dussolve in AR, at least the most common.
Rh dissolves slowly and Ir hardy but still some follow the other PGMs like, Pd and Pt.
To check, put in a slab of Copper to cement out what is there.
Make sure you have good agitation.
What ever powder comes out will be Precious metals plus one or two others.
