[meteorite-list] Questions (chondrules and minerals)

From: Martin Altmann <altmann_at_meteoritecentral.com>
Date: Fri, 18 May 2007 13:22:53 +0200
Message-ID: <019601c7993e$e18413e0$e46dfea9_at_name86d88d87e2>

.....some more...

Chladniite
http://www.mindat.org/search.php?minname=chladni

Brezinaite
http://www.mindat.org/min-768.html

Daubre?lite
http://www.mindat.org/min-1230.html

Barringerite
http://www.mindat.org/min-537.html

Krinovite
http://www.mindat.org/min-2276.html

Heideite
http://www.mindat.org/min-1845.html

Hapkeite
http://www.mindat.org/min-26419.html

(Maskelynite
http://www.mindat.org/min-7765.html)

Haxonite
http://www.mindat.org/min-1836.html

Well a Nortonite, Weirite ect still has to be discovered...

Buckleboo!
(Na,Ca)11Ca4(Si,S,B)14B2O40F2?4H2O


________________________________________
Von: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] Im Auftrag von Piper
R.W. Hollier
Gesendet: Freitag, 18. Mai 2007 10:57
An: meteorite-list at meteoritecentral.com
Betreff: Re: [meteorite-list] Questions (chondrules and minerals)

Hi Greg, Mike, Sterling, and list,

At 21:48 17/05/07, Greg wrote:


1.?????? Has any rock formed on Earth been found containing Chondrules in
it?? If so, what kind of rock and where was it found?

Sterling has a fascinating ability to describe complex processes lucidly and
accurately in layman's terms, so I have nothing to add to his wonderful
explanation except to recommend three good books that describe in some
detail the "geologic processing" that has turned the chondritic precursors
of terrestrial materials into the rocks and minerals that we find today on
Earth:
? Harry J. McSween, Stardust to Planets, St. Martin's Press, 1993, ISBN
0-312-09394-2
? Harry J. McSween, Meteorites and Their Parent Planets, Cambridge
University Press, 1987, ISBN 0-521-32431-9
? Robert T. Dodd, Thunderstones and Shooting Stars, Harvard University
Press, 1986, ISBN 0-674-89137-6


2.?????? Are there any minerals found in Meteorites that are NOT found (or
formed) on earth.

Of the one hundred or so minerals found in meteorites, about twenty-five are
found only in meteorites. Here are some of them; someone who is more of a
mineralogist than I am can hopefully add to this list:

chromite: pure chromite, Fe(2+)Cr2O4, has been found only in meteorites.
Chromite has the general formula (Mg,Fe2+)(Cr,Al,Fe3+)2O4
http://www.answers.com/topic/chromite

clinoferrosillite: FeSi2O6, a high temperature polymorph of ferrosillite
found only in meteorites
http://www.minerals.net/mineral/silicate/ino/pyroxene/enstatit/ferrosil.htm

djerfisherite: K3CuFe12S14
http://www.answers.com/topic/djerfisherite

kamacite: nickel-iron (low nickel), body-centered cubic alpha-Fe,Ni, a
nickel-iron alloy with up to 7.5 percent nickel
http://www.amonline.net.au/geoscience/meteors/types.htm
http://www.lpl.arizona.edu/~ingrid/dictionary.html

merrillite: Ca3(PO4)2, colorless phosphate mineral found only in meteorites
http://www.answers.com/topic/merrillite

nierite: silicon nitride, Si3N4
http://adsabs.harvard.edu/abs/1995Metic..30..387L

niningerite: (Mg,Fe,Mn)S,? mineral found only in meteorites
http://www.answers.com/topic/niningerite

osbornite: titanium nitride, TiN
http://www.galleries.com/minerals/elements/osbornit/osbornit.htm

rhabdite: synonym for schreibersite (see below)

schreibersite: iron-nickel-cobalt phosphide, (Fe, Ni, Co)3P
http://www.amonline.net.au/geoscience/meteors/types.htm

silicon carbide, SiC
http://gsa.confex.com/gsa/2004AM/finalprogram/abstract_78326.htm

taenite: nickel-iron (high nickel), face-centered cubic alpha-Fe,Ni with
varying Ni content (~ 27% to 65%)
http://www.amonline.net.au/geoscience/meteors/types.htm
http://www.lpl.arizona.edu/~ingrid/dictionary.html

ureyite: a sodium chromium pyroxene, NaCrSi2O6, found as rare emerald green
grains in the iron meteorites Coahuila, Toluca, and Hex River Mountains
http://www.sciencemag.org/cgi/content/abstract/149/3685/742

One could make a second list of minerals that are very common in meteorites
and very rare on Earth (for example: troilite, FeS) .

Best wishes,

Piper
Received on Fri 18 May 2007 07:22:53 AM PDT