Pquote="g_axelsson"]
au-artifax said:
AgCl? The ammonia didn't dissolve any of the GG. SnO2? The glucose would have sucked up the weakly bonded oxygen from the tin right away and left tin behind for the HCl to go after when I added HCl to the ammonium hydroxide wash.
And if it matters, yes I DO believe gold may take on a different crystalline structure in certain environmental conditions whether natural or man made. Carbon for example, how many different allotropes does it have?
You may believe in Santa Claus, but it doesn't make it more true. Gold doesn't have any allotropes as far as I know. Neither silver, palladium, platinum, iridium... or any precious metals.
http://en.wikipedia.org/wiki/Allotropy#Metals
Isn't this chemistry thing all based on things we cannot see? So who do you know that can prove there is no such thing as different structures of PM crystals? Is there nothing left to discover or has mankind won the game and learned all there is to know?
That is just stupid to say, chemists have measured reactions on the time scale of femto seconds ( 10
-15 s ) for over twenty years
(example). Atomic force microscopes have been pushing around atoms and measuring the electron cloud around atoms for over a decade.
The
latest generation of electron microscopes have resolution of below 0.1 nm (a gold atom is 0.29 nm) and can study fast processes with femto seconds resolution. :shock:
Even I have an electron microscope, a 30 year old JEOL 100 CX TEM, and I have taken a picture of the crystal structure of gold via electron diffraction. Since it is 30 years old I don't have the same resolution of modern TEM:s, only 1.4Å. I can see molecules but not individual atoms.
X-ray diffraction have been used for revealing the crystal structure of materials for 100 years now.
C'mon guys!
Is there a scientist in the house? And by "scientist" I mean someone hell-bent on "discovery".
Science is built on knowledge and sound theories, not ignorance and dreams.
I'm not a fully fledged scientist but would like to look at myself as having a scientific mind. Science is built on a solid ground of proven and tested facts. A corner stone in the scientific process is peer review, any scientific work is scrutinized and checked from every possible angle and any weaknesses are revealed. If a work (article) can stand up to that level of scrutiny then it is accepted, but if there are weaknesses in it then it is never seen.
What I have seen in this thread is a lot of unsubstantiated statements and purely wrong statements.
- Metastannic acid (the gelatinous white goo that we get when mixing nitric with tin bearing materal) isn't an oxide, it is a hydroxide.
- Describe how glucose is "sucking up the weakly bonded oxygen from the tin"
- No precious metal allotropes are known
- Carbon have a whole lot of different allotropes but what does that have to do with gold or other precious metals?
Do you think I'm treating you harshly? I'm just trying to treat you in a scientific way, the way I've seen responses to badly written articles in scientific magazines. Editors and peer review could be quite frank when pointing out wrongs.
I have run into a lot of "grey goop" several times. Every time I have concluded that it is mostly metastannic acid, silver chloride, lead sulphate, lead chloride and probably some other chemicals in a mix. I don't care that much as everything I catch in a filter will be incinerated and leached again before I discards it. Probably it also contained some gold and palladium but the bulk makes it too hard and not worth going after small traces on a batch level.
Göran