Melliniite

A valid IMA mineral species

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Melliniite

Northwest Africa 1054 meteorite, Northwest Africa Meteorites

Melliniite

Northwest Africa 1054 meteorite, Northwest Africa Meteorites

Melliniite

Northwest Africa 1054 meteorite, Northwest Africa Meteorites

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About MelliniiteHide

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Marcello Mellini

Formula:

(Ni,Fe)₄P

Lustre:

Metallic

Hardness:

8 - 8½

Specific Gravity:

7.882

Crystal System:

Isometric

Name:

Honouring Prof. Marcello Mellini (b. 1949, Arcola (La Spezia), Italy), Mineralogist in the Universities of Perugia, Pisa and Siena, for his development of meteorite studies in Italy.

Type Locality:

ⓘ Northwest Africa 1054 meteorite (NWA 1054), Northwest Africa Meteorites

Chemically related to halamishite, nazarovite, negevite, nickelphosphide, transjordanite, and 'Unnamed (Ni-Fe Phosphide)'.

Unique IdentifiersHide

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Mindat ID:

28998

Long-form identifier:

mindat:1:1:28998:6

GUID
(UUID V4):

c23efa86-debb-4882-9037-a0d561e95842

Classification of MelliniiteHide

Mineral SymbolsHide

Physical Properties of MelliniiteHide

Optical Data of MelliniiteHide

Bireflectance:

No bireflectance

Reflectivity:

Wavelength	R
471.1nm	60.56%
548.3nm	50.44%
586.6nm	52.51%
652.3nm	55.94%

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 60.56%.

Colour in reflected light:

Cream-yellowish

Internal Reflections:

None

Pleochroism:

Non-pleochroic

Chemical Properties of MelliniiteHide

Crystallography of MelliniiteHide

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0004124	Melliniite	Pratesi G, Bindi L, Moggi-Cecchi V (2006) Icosahedral coordination of phosphorus in the crystal structure of melliniite, a new phosphide mineral from the Northwest Africa 1054 acapulcoite American Mineralogist 91 451-454		2006		0	293

CIF Raw Data - click here to closedata_global _chemical_name_mineral 'Melliniite' loop_ _publ_author_name 'Pratesi G' 'Bindi L' 'Moggi-Cecchi V' _journal_name_full 'American Mineralogist' _journal_volume 91 _journal_year 2006 _journal_page_first 451 _journal_page_last 454 _publ_section_title ; Icosahedral coordination of phosphorus in the crystal structure of melliniite, a new phosphide mineral from the Northwest Africa 1054 acapulcoite ; _database_code_amcsd 0004124 _chemical_formula_sum '(Ni2.32 Fe1.68) P' _cell_length_a 6.025 _cell_length_b 6.025 _cell_length_c 6.025 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 218.711 _exptl_crystal_density_diffrn 7.925 _symmetry_space_group_name_H-M 'P 21 3' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-z,-x,1/2+y' '-z,1/2+x,1/2-y' '1/2+z,1/2-x,-y' 'z,x,y' '1/2+y,1/2-z,-x' '1/2-y,-z,1/2+x' '-y,1/2+z,1/2-x' 'y,z,x' '-x,1/2+y,1/2-z' '1/2+x,1/2-y,-z' '1/2-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv Ni1 0.11684 0.20686 0.45493 0.58000 0.02900 Fe1 0.11684 0.20686 0.45493 0.42000 0.02900 Ni2 0.68030 0.68030 0.68030 0.58000 0.02610 Fe2 0.68030 0.68030 0.68030 0.42000 0.02610 P 0.06220 0.06220 0.06220 1.00000 0.02420 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Ni1 0.02950 0.02890 0.02860 0.00010 -0.00020 0.00010 Fe1 0.02950 0.02890 0.02860 0.00010 -0.00020 0.00010 Ni2 0.02610 0.02610 0.02610 0.00040 0.00040 0.00040 Fe2 0.02610 0.02610 0.02610 0.00040 0.00040 0.00040 P 0.02420 0.02420 0.02420 -0.00030 -0.00030 -0.00030

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of MelliniiteHide

Synonyms of MelliniiteHide

Other Language Names for MelliniiteHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for MelliniiteHide

References for MelliniiteHide

Reference List:

Moggi-Cecchi, V., Bindi, L., Pratesi, G. (2005): A new iron-nickel phosphide from the Northwest Africa 1054 Meteorite. 68th Annual Meteoritical Society Meeting, 5308.

Pratesi, G., Bindi, L., Moggi-Cecchi, V. (2006): Icosahedral coordination of phosphorus in the crystal structure of melliniite, a new phosphide mineral from the Northwest Africa (NWA) 1054 acapulcoite. American Mineralogist: 91: 451-454.

Localities for MelliniiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Brazil
Bahia Maracás Rio Jacaré layered complex ⓘ Maracás Menchen mine	Campbell, R. A. (2012). Platinum Group Element (PGE) Mineralization Associated with Fe-Ti-V Deposit, Rio Jacaré Intrusion, Bahia State, Brazil. Bachelors honour thesis Dalhousie University, Halifax Nova Scotia
Greece
Central Greece Phthiotis Domokos ⓘ Agios Stefanos mine	Ifandi, E., Zaccarini, F., Tsikouras, B., Grammatikopoulos, T., Garuti, G., Karipi, S., & Hatzipanagiotou, K. (2018). First occurrences of Ni-V-Co phosphides in chromitite from the Agios Stefanos Mine, Othrys Ophiolite, Greece. Ofioliti, 43(2), 131-145. Zaccarini, F., Ifandi, E., Tsikouras, B., Grammatikopoulos, T., Garuti, G., Mauro, D., ... & Stanley, C. (2019). Occurrences of of new phosphides and sulfide of Ni, Co, V, and Mo from chromitite of the Othrys ophiolite complex (Central Greece). Per. Ital. Mineral, 88. Economou-Eliopoulos, Maria, and Federica Zaccarini. (2022) "On the Origin of New and Rare Minerals Discovered in the Othrys and Vermion Ophiolites, Greece: An Overview" Minerals 12, no. 10: 1214. https://doi.org/10.3390/min12101214
Northwest Africa Meteorites
ⓘ Northwest Africa 1052 meteorite (NWA 1052)	V. Moggi-Cecchi et al., 2005
ⓘ Northwest Africa 1054 meteorite (NWA 1054) (TL)	Moggi-Cecchi, V., Bindi, L., Pratesi, G. (2005): A new iron-nickel phosphide from the Northwest Africa 1054 Meteorite. 68th Annual Meteoritical Society Meeting, 5308. Pratesi, G., Bindi, L., Moggi-Cecchi, V. (2006): Icosahedral coordination of phosphorus in the crystal structure of melliniite, a new phosphide mineral from the Northwest Africa (NWA) 1054 acapulcoite. American Mineralogist: 91: 451-454.
Russia
Chelyabinsk Oblast Korkinsky District ⓘ Korkino	Sharygin, V. V., & Sokol, E. V. (2010). Metal-phosphide-sulfide association in paralavas from natural fires and burned waste dumps (Kuznetsk and Chelyabinsk coal basins, Russia). In Proceedings of «ICCFR2–Second International Conference on Coal Fire Research». Berlin, Germany (pp. 410-411).
The Moon
Mare Crisium ⓘ Luna 24 landing site	Analytical data Andrei Mokhov and Pavel Kartashov, 2010.