[meteorite-list] New Iron-Nichel posphide official name

From: Martin Altmann <Altmann_at_meteoritecentral.com>
Date: Sat Nov 26 10:07:48 2005
Message-ID: <00c201c5f29c$f7b0b460$14599a54_at_9y6y40j>

Hi G?ran,

I have another guess.
At the Museo di Scienze Planetarie of Prato
(http://www.mspo.it/ingl/homei.html)
is working a mineralogist a certain Marcello Mellini (Modesty is his middle
name).
In a sudden fit of unassumigness, he decided to name the new mineral
"nahabedite". Matteo couldn't accept this honour and in a generous act of
reconciliation,
he proposed to name it "farmerite". Unfortunately all his emails ended up in
Mike's spam folder,
but the professor couldn't wait anylonger with the publication,
so that he finally called it:
Mellini-ite.

Buckleboo.
Martin



----- Original Message -----
From: "G?ran Axelsson" <axelsson_at_acc.umu.se>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Saturday, November 26, 2005 3:52 PM
Subject: Re: [meteorite-list] New Iron-Nichel posphide official name


> I see the problem here. You said it was named "merrillite" in your
> second mail and that was the mineral name I commented. In the abstract
> it is one of the accessory minerals, not the name of the new phosphide.
> I can't see anything about the name of the new phosphide mentioned in
> the abstract. I doubt that melliniite is the official name as it usually
> takes a long time to get a new mineral name accepted. But it probably is
> the proposed name.
>
> /G?ran
>
> M come Meteorite Meteorites wrote:
>
> >I doubt many is a old news, seen the found have
> >presented in the last Met.Society Meeting
> >
> >A NEW IRON-NICKEL PHOSPHIDE FROM THE NORTHWEST AFRICA
> >1054 METEORITE. V. Moggi-Cecchi1, L.Bindi2, and G.
> >Pratesi2,3, 1Museo di Scienze Planetarie, Provincia di
> >Prato, Via Galcianese, 20/h, I-59100 Prato, Italy,
> >2Museo di Storia Naturale, Universit? degli Studi di
> >Firenze, I-50121 Firenze, Italy, 3Dipartimento di
> >Scienze della Terra, Universit? di Firenze, Via La
> >Pira, 4, I-50121, Florence, Italy
> >
> >Introduction: NWA 1054 is a primitive achondrite
> >(acapulco-ite) with a main mass weighing 86 g. The
> >thin section displays a granular texture with olivine
> >and low-Ca pyroxene as major phases and high
> >Ca-pyroxene and plagioclase as minor; major
> >non-silicate phases are metal and troilite. Accessory
> >phases include merrillite, a Mg-rich chromite and two
> >iron-nickel phosphides. Terrestrial weathering grade
> >is low (W1) as well as shock stage (S1). The Museo di
> >Scienze Planetarie of Prato (MSP) owns the type
> >speci-men (MSP2366) [1].
> >
> >Description: Six natural phophides are known:
> >schreibersite, (Fe,Ni,)3P, nickelphosphide (Ni,Fe)3P
> >[2], barringerite (Fe,Ni)2P [3], allabogdanite
> >(Fe,Ni)2P [4], florenskyite FeTiP [5] and perry-ite,
> >(Ni,Fe)8(Si,P)3 [6]. In the course of a study on some
> >acapulco-ites a new rather common iron-nickel
> >phosphide was discovered in the NWA 1052 and 1054
> >acapulcoites [7]. The chemical composi-tion of the new
> >phase, determined by EMPA, is
> >(Ni2.30Fe1.64Co0.01)&#931;=3.95P1.05, pointing to a
> >4:1 metal/phosphorous ratio. It occurs as anhedral
> >grains up to 100 &#956;m either associated with
> >kamacite (Fig. 1A) or with nickelphosphide (Fig. 1B).
> >Micro-indentation measurements provided a value (447
> >kg/mm2) lower than nickelphosphide. In reflected
> >light, the new phase is cream-yellowish, non
> >pleochroic, isotropic, and shows no bireflectance,
> >without internal reflections. Reflectance values are
> >60.56, 50.44 52.51 and 55.94 % at 471.1, 548.3, 586.6,
> >and 652.3 nm, respec-tively. A single-crystal X-ray
> >diffraction study, carried out on a small crystal
> >fragment, indicates a cubic lattice with a = 6.025 ?
> >0.001 and points to a space group P213 with Z = 4.
> >Both the coor-dination-number (12) and the density
> >(7.882 g/cc) are the highest ever reported for
> >phosphorus and iron-nickel phosphides, respec-tively.
> >
> >Conclusions: The structure and the physical properties
> >suggest that the new iron nickel phosphide could play
> >an important role for Earth?s core mineralogy. Due to
> >the presence of this phase NWA 1054 acapulcoite seems
> >to be a really peculiar acapulcoite if com-pared with
> >literature data [8-9].
> >
> >References: [1] Moggi Cecchi V. & Pratesi G. (2005)
> >MAPS, 40, in press [2] Sk?la R. & Dr?bek M. (2003)
> >Min. Mag. 67, 783 [3] Buseck P.R. (1969) Science
> >165,169 [4] Britvin S.N. et al., (2002) Am. Min.. 87,
> >1245 [5] Ivanov A.V. et al., (2000) Am. Min. 85, 1082
> >[6] Okada A. et al. (1988) MAPS 23, 59 [7]
> >Moggi-Cecchi V., Pratesi G., Mancini L., (2005) LPSC.
> >XXXVI, abs. #1808 [8] Patzer A., Hill D.H., Boynton
> >W.V. (2004) MAPS 39, 61 [9] Scott E.R.D. & Pinault,
> >L.J. (1999) LPSC. XXX, abs. #1507.
> >
> >
> >
> >Matteo
> >
> >--- G?ran Axelsson <axelsson_at_acc.umu.se> ha scritto:
> >
> >
> >
> >>What is the big news?
> >>
> >>Merrillite (Ca3(PO4)2) is found in several
> >>meteorites. From martian
> >>meteorites () to pallasites (Springwater). Another
> >>meteorites containing
> >>merrillite are Portales Valley, Forest Vale,
> >>Ankober, Allegan, Allegan,
> >>Estacado, and several more.
> >>
> >>And among the acapulcoites are Dhofar 1222.
> >>
> >>It doesn't seem to be such a rare phosphate to me.
> >>
> >>/G?ran
> >>
> >>M come Meteorite Meteorites wrote:
> >>
> >>
> >>
> >>>Hello
> >>>
> >>>Today in the Museo di Scienze Planetarie of Prato
> >>>
> >>>
> >>it
> >>
> >>
> >>>comes presented the new Iron-Nichel posphide found
> >>>
> >>>
> >>in
> >>
> >>
> >>>my acapulcoite NWA 1054. The official name of the
> >>>posphide its melliniite.
> >>>
> >>>Matteo
> >>>
> >>>
> >>>M come Meteorite - Matteo Chinellato
> >>>Via Triestina 126/A - 30030 - TESSERA, VENEZIA,
> >>>
> >>>
> >>ITALY
> >>
> >>
> >>>Email: mcomemeteorite2004_at_yahoo.it
> >>>Sale Site: http://www.mcomemeteorite.it
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> >>>
> >>>
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> >>
> >>
> >>>
> >>>
> >>>
> >>>
> >>>___________________________________
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> >>>
> >>>
> >>da 10MB
> >>
> >>
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> >>
> >>>
> >>>
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> >>>
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> >
> >
> >
> >M come Meteorite - Matteo Chinellato
> >Via Triestina 126/A - 30030 - TESSERA, VENEZIA, ITALY
> >Email: mcomemeteorite2004_at_yahoo.it
> >Sale Site: http://www.mcomemeteorite.it
> >Collection Site: http://www.mcomemeteorite.info
> >MSN Messanger: spacerocks at hotmail.com
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> >
> >
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Received on Sat 26 Nov 2005 10:20:42 AM PST