Stanekite Mineral Data

Stanekite Mineral Data
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General Stanekite Information

Help on Chemical Formula: Chemical Formula: Fe+++(Mn,Fe++,Mg)(PO4)O
Help on Composition: Composition: Molecular Weight = 218.97 gm
   Magnesium    1.11 %  Mg    1.84 % MgO
   Manganese   15.05 %  Mn   19.44 % MnO
   Iron        33.16 %  Fe    9.84 % FeO / 36.47 % Fe2O3
   Phosphorus  14.15 %  P    32.41 % P2O5
   Oxygen      36.53 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+Mn2+0.6Fe2+0.3Mg0.1(PO4)O
Help on Environment: Environment: Related to triploidite and wolfeite.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: The Clementine II pegamtite, Okatjimukuja farm, Karibib, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Josef Stanek (1928-1995), Professor of Mineralogy, Masarykov University, Brno, Czech Republic, a specialist in phosphate mineralogy.
Help on Name Pronunciation: Name Pronunciation: Stanekite + Pronunciation Say STANEKITE
Help on Synonym: Synonym: IMA1994-045
 

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Stanekite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9353:1:0.7888
Help on Cell Dimensions: Cell Dimensions: a = 11.844, b = 12.662, c = 9.989, Z = 16; beta = 105.933° V = 1,440.49 Den(Calc)= 4.04
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.971(1), 2.809(0.85), 2.857(0.58),
Click Here for Large Stanekite Structure Window Crystal Structure:

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Keller P , Lissner F , Schleid T , European Journal of Mineralogy , 18 (2006) p.113-118, The crystal structure of stanekite, (Fe3+,Mn2+,Fe2+,Mg)2[PO4]O, from Okatjimukuju,, Karibib (Namibia), and its relationship to the polymorphs of synthetic Fe2[PO4]O, Locality: Okatjimukuju, Karibib, Namibia, Note: Uiso(O4) corrected

 

Physical Properties of Stanekite

Help on Cleavage: Cleavage: {hk0} Parting
Help on Color: Color: Black.
Help on Density: Density: 3.8
Help on Diaphaneity: Diaphaneity: Opaque to subtranslucent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: dark brown
 

Optical Properties of Stanekite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.189 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.118 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2624,KPDmeas= 0.2789,KC= 0.2347
Ncalc = 1.89 - 1.95
Help on Optical Data: Optical Data: Biaxial (?), a=2.01, b=2.11,
Help on RL Anisotrophism: RL Anisotrophism: Distinct, pale brownish gray.
Help on RL Bireflectance: RL Bireflectance: Weak.
Help on RL Color: RL Color: Pale gray with reddish yellow to brownish red internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Stanekite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   12.86   15.20 
   
 420 nm   11.90   14.00 
 440 nm   11.15   13.05 
 460 nm   10.90   12.75 
 480 nm   10.75   12.46 
 500 nm   10.57   12.33 
 520 nm   10.41   12.33 
 540 nm   10.48   12.26 
 560 nm   10.52   12.25 
 580 nm   10.68   12.29 
 600 nm   10.69   12.31 
 620 nm   10.75   12.30 
 640 nm   10.77   12.35 
 660 nm   10.80   12.42 
 680 nm   10.72   12.33 
 700 nm   10.54   12.15 
Calculated Relative Intensity Colors of Stanekite in Air
Relative
Intensity		    0%   90% 100% 180% 270% 360% 450% 540% 630% 720% 810% 830%
R1                        
R2                        
 

Calculated Properties of Stanekite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.87 gm/cc
note: Specific Gravity of Stanekite =4.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0083145264
Boson Index = 0.9916854736
Help on Photoelectric: Photoelectric: PEStanekite = 14.64 barns/electron
U=PEStanekite x rElectron Density= 56.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stanekite is Not Radioactive
 

Stanekite Classification
Help on Dana Class: Dana Class: 41.06.03.04 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.06)where (A)2 (XO4) Zq
  (41.06.03)Wolfeite Group
 
41.06.03.01 Wolfeite (Fe,Mn)2(PO4)(OH) P 21/a 2/m
 
41.06.03.02 Triploidite (Mn,Fe)2(PO4)(OH) P 21/a 2/m
 
41.06.03.03 Sarkinite Mn2(AsO4)(OH) P 21/a 2/m
 
41.06.03.04 Stanekite! Fe(Mn,Fe,Mg)(PO4)O P 21/a 2/m
 
41.06.03.06 Joosteite! (Mn,Mn,Fe)2(PO4)O I2/a 2/m
Help on Strunz Class: Strunz Class: 08.BB.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 £ 1:1
 
08.BB.15 Sarkinite Mn2(AsO4)(OH) P 21/a 2/m
 
08.BB.15 Stanekite! Fe(Mn,Fe,Mg)(PO4)O P 21/a 2/m
 
08.BB.15 Triploidite (Mn,Fe)2(PO4)(OH) P 21/a 2/m
 
08.BB.15 Wagnerite (Mg,Fe)2(PO4)F P 21/a 2/m
 
08.BB.15 Wolfeite (Fe,Mn)2(PO4)(OH) P 21/a 2/m
 
08.BB.15 Joosteite! (Mn,Mn,Fe)2(PO4)O I2/a 2/m
 

Other Stanekite Information
Help on References: References: NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.9,p475-482,1997) OPTIC PROP.(AntBidBlaNic4, MinRec)
Help on See Also: See Also: Links to other databases for Stanekite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

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Stanekite

Fe+++(Mn,Fe++,Mg)(PO4)O
Dana No: 41.06.03.04 Strunz No: 08.BB.15
Locality:

 

Notes: