[ARC5] Crystals in WWII

[J. Forster]

I think that HF is often generated at the reaction site by mixing a metal
Fluoride (like CaF2) with an acid.

It is nasty, dangerous stuff to handle and store in pure form.

-John

==============



> On 15 Mar 2013 at 8:53, D C _Mac_ Macdonald wrote:
>
>>
>> "HF" ?
>
> Hydrogen Flouride = Hydroflouric Acid.
>
> Very highly dangerous stuff as it can be absorbed through the skin and
> will
> attack bone under the flesh. It will also burn the flesh.
>
> It is the only acid that will dissolve glass....and quartz...so it must be
> stored in
> special plastic bottles.
>
> It is, or was, used to "etch" both glass for artistic glassware, and
> quartz for
> crystals.
>
> Bliley discovered and used it first for crystals. It has been used for
> centuries
> to etch designs into glassware, like vases and drinking glasses.
>
> As I said, surprising as it may seem, "Whink" has a bit of HF in it.
>
> Ken W7EKB
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