Mineralogy Database

Malhmoodite Mineral Data

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General Malhmoodite Information

Help on Chemical  Formula: Chemical Formula: FeZr(PO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 409.07 gm
   Zirconium   22.30 %  Zr   30.12 % ZrO2
   Iron        13.65 %  Fe   17.56 % FeO
   Phosphorus  15.14 %  P    34.70 % P2O5
   Hydrogen     1.97 %  H    17.62 % H2O
   Oxygen      46.93 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+Zr(PO4)2•4(H2O)
Help on Environment: Environment: Secondary mineral on bladed kolbeckite in pyroxenite vanadium ores.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Bertha K. Malhmood, long-time secretary and administrative assistant of the Branch of Analytical Laboratories, US Geological Survey.
Help on Synonym: Synonym: IMA1992-001

Malhmoodite Image

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Comments: Small white aggregate of malhmoodite on matrix.
Location: Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Malhmoodite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.6826:1:3.5369
Help on Cell Dimensions: Cell Dimensions: a = 9.12, b = 5.42, c = 19.17, Z = 4; beta = 94.8° V = 944.26 Den(Calc)= 2.88
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.16(1), 4.382(0.8), 9.58(0.75),

Physical Properties of Malhmoodite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Cream white.
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Malhmoodite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.225,KC= 0.22
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.64, b=1.652, g=1.652, bire=0.0120, 2V(Calc)=0, 2V(Meas)=0.

Calculated Properties of Malhmoodite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Malhmoodite =2.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMalhmoodite = 34.16 barns/electron
U=PEMalhmoodite x rElectron Density= 96.19 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Malhmoodite is Not Radioactive

Malhmoodite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.01)where A++ B++ (XO4) � x(H2O)
  (40.01.05)Dana Group Malhmoodite FeZr(PO4)2•4(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.CE.75 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CE -With only medium-sized cations, RO4:H2O � 1:2.5
08.CE.75 Malhmoodite FeZr(PO4)2•4(H2O) P 21/c 2/m
08.CE.75 IMA2008-046! MgZr(PO4)2•4H2O P1 1

Other Malhmoodite Information

Help on References: References: NAME( Am.Min.,Vol.78,p437) PHYS. PROP.(Am.Min.,Vol.78,p437-440,1993) OPTIC PROP.(Am.Min.,Vol.78,p437-440,1993)
Help on See Also: See Also: Links to other databases for Malhmoodite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.CE.75





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