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Re: "akaganeite"?
> To a mineralogist akaganeite is beta-FeO(OH,Cl), a member of the limonite
> family that includes goethite, lepidocrocite, and maghemite. To a meteorite
> collector it means the beginning of the end for an iron meteorite.
>
> Akaganeite has been implicated of being, if not the actual culprit, then at
> least the carrier of the chlorine ion involved in the run-away,
> rust-producing reaction popularly known as "Lawrencite Disease".
Hi Bob and List,
I realize "Lawrencite Disease" is a term from O. R. Nortonīs popular
book "Rocks from Space". But shouldnīt it rather be called "Akaganeite
Disease" for scientific accuracy? I donīt have the sources at hand, but
as far as I recall Lawrencite vs. Akaganeite has been a debate, or am I
wrong? Any specialist out there in mineralogy who can add details to
that?
> "Oh boy! Not only do I get a Nan Tan meteorite, but I get a RARE mineral on
> top of it - akaganeite! Lucky me."
> He says, tongue-in-cheek,
Yeah, really sounds much more emphatically than what it plainly is:
rust!
Btw: it would be worth naming all the meteorites again here on this list
that seem to be susceptible to rust. Not only Nantan is the one, there
are other likely candidates: Lamont, Brenham, just to name two of many,
many more, though sometimes it strongly depends on the individual cuts
made.
Alex
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