[meteorite-list] Cubic forms of meteoritic minerals Winners Announced Pt.1

[Eduardo.]

Hi Dirk

If you look at your quiz:

>Quiz: Do cubic forms exist in meteorites and in
> which minerials?  A prize will be rewarded for the
> most correct and detailed answer.  Thank you and cube
> on,  Dirk Ross....Tokyo

You are looking for CUBIC FORMS. Most of the minerals listed have a cubic 
crystalline structure, but that does not mean that the minerals have 
cubic form in the meteorites.
For example, when I mentioned that I found cubic crystals of magnetite in 
my nantan specimens, that surprised me a lot, as magnetite, although 
cubic have a cubic structure, usually is found as octahedrons, not cubes. 
I have terrestrial crystals of magnetite from over 20 locations, but 
cubic from only 2)
Most of the minerals described in meteorites have no crystal form, they 
are just massive, so no "CUBIC FORM".
best regards
Eduardo


-----Original Message-----
From: drtanuki <drtanuki at yahoo.com>
To: meteorite-list at meteoritecentral.com, Bernd <bernd.pauli at paulinet.de>, 
Harald Stehlik <harald.stehlik at ericsson.com>
Date: Mon, 21 Feb 2005 10:06:03 -0800 (PST)
Subject: [meteorite-list] Cubic forms of meteoritic minerals Winners 
Announced Pt.1

> Dear List,
>    I had many replies from members of this list. 
> Bernd had the most complete list and wins the First
> Prize.  Harald Shehlik wins second prize because he
> included more information, but his list did not
> include as many cubic minerals as Bernd. Tom K. wins
> the Proud Tom prize for his "Proud Tom" answer that,
> "it depends on how big you cut the meteorite into a
> cube".  Thank you for all that participated!!!
>   First Prize: 50grams of Potter, Nebraska. Second
> Prize: Special impactite. Proud Tom Prize: a
> meteorite.  I will in Pt.2 send Harald`s answer.
>   Perhaps someone on this list will kindly add these
> answers to their website ((please cite Bernd Pauli,
> Harald Stehlik and Dirk Ross (I contributed to three
> of Bernd`s answers)if used)).
>   Best to all, from Tokyo, Dirk Ross
> 
> --- bernd.pauli at paulinet.de wrote:
> 
>  Date: 21 Feb 2005 09:39:00
> > 
> > 01) cristobalite (SiO2)
> > 02) gold (Au)
> > 03) silver (Ar)
> > 04) copper (Cu)
> > 05) kamacite (alpha-FeNi)
> > 06) pyrite (FeS2)
> > 07) taenite (gamma-FeNi)
> > 09) halite (NaCl)
> > 10) sylvite (KCl)
> > 11) periclase (MgO)
> > 12) perovskite (CaTiO3)
> > 13) diamond (C)
> > 14) haxonite (FeNi)23C6)
> > 15) carlsbergite (CrN)
> > 16) sphalerite (ZnS)
> > 17) daubreelite (FeCr2S4)
> > 18) djerfisherite (K3CuFe12S14)
> > 19) pentlandite (FeNi)9S8)
> > 20) ferromagnesian alabandite (Fe0.2Mg0.3Mn0.5)S
> > 21) magnetite (Fe3O4)
> > 22) wEtite (Fe1-xO)
> > 23) chromite (FeCr2O4)
> > 24) spinel (MgAl2O4)
> > 25) hercynite (FeMg)Al2O4)
> > 26) ulvöspinel (Fe2TiO4)
> > 27) galena (PbS)
> > 28) cliftonite (cliftonitic graphite => C)
> > 29) austenite (face centered cubic austenite)***
> > 30) cuprite (Cu2O)
> > 31) suessite (Fe3Si)
> > 32) cubic martensite (alpha2-FeNi)
> > 33) melilite (square cross sections /
> > [(Ca,Na)2(Mg,Al)(si,Al)2O7])
> > 34) gehlenite (square cross sections /
> > [Ca2Al(AlSiO7)])
> > 35) akermanite (square cross sections) /
> > [(Ca2MgSi2O7)])
> > 36) sodalite [(Na4(Si3Al3)O12Cl)]
> > 37) roaldite (FeNi)4N
> > 38) osbornite (TiN)
> > 
> > Bernd
> > 
> > *** My checking indicates that Austenite is the
> terrestrial form of Taenite. dirk
> 
> 
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