Mineralogy Database

Allabogdanite Mineral Data

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General Allabogdanite Information

Help on Chemical  Formula: Chemical Formula: (Fe,Ni)2P
Help on Composition: Composition: Molecular Weight = 145.21 gm
   Iron        57.69 %  Fe
   Cobalt       1.22 %  Co
   Nickel      20.61 %  Ni
   Phosphorus  20.48 %  P
              100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+1.5Ni0.51Co0.03P0.96
Help on Environment: Environment: Microscopic exsolved laths disseminated in plessite. Isostructural with rhodarsenide. Orthorohmbic polymoph of barringerite,
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Onello meteorite, an iron-rich ataxite, was found in the alluvium of the Bol'shoy Dolguchan River, Onello River Basin, Aldan shield, Sakha-Yakutia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alla Bogdanova, Geological Institute, Kola Science Centre of Russian Academy of Sciences.
Help on Synonym: Synonym: IMA2000-038

Allabogdanite Image

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  Allabogdanite   Schreibersite

Comments: Relict grain of allabogdanite crystal (ABG) surrounded by schreibersite rim (SCHR) in plessite matrix (PL). Black phase is a secondary Fe-Ni-hydroxide. Backscattered electron image. (AmMin, 87:1249).
Location: Onello iron meteorite (high-Ni ataxite) Onello River basin, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Scale bar 10 µ-m.
© American Mineralogist

Allabogdanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.62:1:1.8773
Help on Cell Dimensions: Cell Dimensions: a = 5.748, b = 3.548, c = 6.661, Z = 4; V = 135.84 Den(Calc)= 7.10
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.238(1)(112), 2.12(0.8)(211), 2.073(0.7)(103),1.884(0.5)(013), 1.758(0.4), 1.774(0.4)(020), 1.788(0.4)(113), 1.843(0.4)(301),

Physical Properties of Allabogdanite

Help on Cleavage: Cleavage: None
Help on Color: Color: Light straw yellow.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Metallic

Optical Properties of Allabogdanite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Allabogdanite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 440 nm   48.40   37.20 
 460 nm   46.70   36.80 
 480 nm   47.00   37.60 
 500 nm   47.50   38.10 
 520 nm   47.60   38.80 
 540 nm   48.20   39.20 
 560 nm   49.00   39.90 
 580 nm   49.60   40.70 
 600 nm   50.10   41.90 
 620 nm   50.50   41.90 
 640 nm   51.90   43.00 
 660 nm   52.30   44.30 
 680 nm   53.30   45.00 
 700 nm   54.40   46.20 
Calculated Relative Intensity Colors of Allabogdanite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240%

Calculated Properties of Allabogdanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.70 gm/cc
note: Specific Gravity of Allabogdanite =7.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEAllabogdanite = 27.44 barns/electron
U=PEAllabogdanite x rElectron Density= 183.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Allabogdanite is Not Radioactive

Allabogdanite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.01)with metallic elements other than the platinum group
  (01.01.21)Barringerite Group phosphides Barringerite (Fe,Ni)2P P 62m 6 m2 Schreibersite (Fe,Ni)3P I 4 4 Nickelphosphide! (Ni,Fe)3P I 4 4 Allabogdanite! (Fe,Ni)2P P nma 2/m 2/m 2/m Melliniite! (Ni,Fe)4P P 213 2 3 Monipite! MoNiP P 6 2m 6 m2
Help on  Strunz Class: Strunz Class: 01.BD.15 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.B - Metallic Carbides, Silicides, Nitrides and Phosphides
  01.BD -Phosphides
01.BD.15 Allabogdanite! (Fe,Ni)2P P nma 2/m 2/m 2/m
01.BD.15 Florenskyite! (Fe,Ni)TiP P nma 2/m 2/m 2/m
01.BD.15 Andreyivanovite! FeCrP P nma 2/m 2/m 2/m

Other Allabogdanite Information

Help on References: References: NAME( AmMin, 87:1245) PHYS. PROP.(AmMin, 87:1245) OPTIC PROP.(AmMin, 87:1245)
Help on See Also: See Also: Links to other databases for Allabogdanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 01.BD.15





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