Gladiusite Mineral Data

Gladiusite Mineral Data
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General Gladiusite Information

Help on Chemical Formula: Chemical Formula: Fe++2(Fe+++,Mg)4(PO4)(OH)13•H2O
Help on Composition: Composition: Molecular Weight = 579.01 gm
   Magnesium    6.72 %  Mg   11.14 % MgO
   Manganese    0.95 %  Mn    1.23 % MnO
   Iron        40.51 %  Fe   27.30 % FeO / 27.58 % Fe2O3
   Phosphorus   5.35 %  P    12.26 % P2O5
   Hydrogen     2.26 %  H    20.22 % H2O
   Oxygen      44.21 %  O
              ______        ______ 
              100.00 %       99.72 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+2.2Fe3+2Mg1.6Mn2+0.1(PO4)(OH)11·(H2O)
Help on Environment: Environment: Hydrothermal mineral associated with vugs in a dolomite carbonatite.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Kovdor alkaline-ultramafic complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Name alludes to the crystal morphology which resembles a double edged sword (gladius, Latin for sword).
Help on Synonym: Synonym: IMA1998-011
 

Gladiusite Image

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Gladiusite

Comments: Radiating group of dark olive-greenish acicular crystals of gladiusite on matrix.
Location: Kovdor Mine, Kovdor massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag
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Gladiusite

Comments: SEM photomicrograph showing the morphology of the free-standing crystals of gladiusite. (CanMin v. 38, p 1480).
Location: Kovdor alkaline-ultramafic complex, Kola Peninsula, Russia. Scale: See Image.
© Canadian Mineralogist

Gladiusite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.4557:1:0.5378
Help on Cell Dimensions: Cell Dimensions: a = 16.959, b = 11.65, c = 6.266, Z = 4; beta = 90° V = 1,237.99 Den(Calc)= 3.11
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.805(1)(220), 5.83(0.89)(020), 3.533(0.84)(230),6.87(0.77)(210), 2.868(0.66)(140,430), 3.787(0.62), 9.61(0.53)(110),
Help on Forms: Forms:

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Forms: ( 12 1 1) ( 6 1 0)

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Click Here for Large Gladiusite Structure Window Crystal Structure:

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Sokolova E V , Hawthorne F C , McCammon C A , Liferovich R P , The Canadian Mineralogist , 39 (2001) p.1121-1130, The crystal structure of gladiusite, (Fe,Mg)4Fe2(PO4)(OH)11(H2O)

 

Physical Properties of Gladiusite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark green.
Help on Density: Density: 3.11
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: olive green
 

Optical Properties of Gladiusite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.077 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.077 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2346,KPDmeas= 0.2346,KC= 0.2541
Ncalc = 1.79
Help on Optical Data: Optical Data: Biaxial (-), a=1.722, b=1.73, g=1.737, bire=0.0150
 

Calculated Properties of Gladiusite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.08 gm/cc
note: Specific Gravity of Gladiusite =3.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGladiusite = 12.60 barns/electron
U=PEGladiusite x rElectron Density= 38.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gladiusite is Not Radioactive
 

Gladiusite Classification
Help on Dana Class: Dana Class: 42.11.18.05 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq · x(H2O)
  (42.11.18)Whitmoreite Group
 
42.11.18.01 Whitmoreite FeFe2(PO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.02 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2•4(H2O) P 21/c 2/m
 
42.11.18.03 Ojuelaite ZnFe2(AsO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.04 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.05 Gladiusite! Fe2(Fe,Mg)4(PO4)(OH)13•H2O P 21/n 2/m
 
42.11.18.06 Cobaltarthurite! CoFe2(AsO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.07 Kunatite CuFe2(PO4)2(OH)2•4H2O P 21/c 2/m
 
42.11.18.08 Bendadaite! FeFe2(AsO4)2(OH)2•4H2O P 21/c 2/m
Help on Strunz Class: Strunz Class: 08.DF.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DF -With only medium-sized cations, (OH,etc.):RO4 > 3:1
 
08.DF.40 Gladiusite! Fe2(Fe,Mg)4(PO4)(OH)13•H2O P 21/n 2/m
 

Other Gladiusite Information
Help on References: References: NAME( AmMin, Vol 86, p1113) PHYS. PROP.(AmMin, Vol 86, p1113) OPTIC PROP.(AmMin, Vol 86, p1113)
Help on See Also: See Also: Links to other databases for Gladiusite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Gladiusite

Fe++2(Fe+++,Mg)4(PO4)(OH)13•H2O
Dana No: 42.11.18.05 Strunz No: 08.DF.40
Locality:

 

Notes: