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Malhmoodite Mineral Data
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General Malhmoodite Information
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Chemical Formula: |
FeZr(PO4)2•4(H2O) |
Composition: |
Molecular Weight = 409.07 gm |
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Zirconium 22.30 % Zr 30.12 % ZrO2 |
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Iron 13.65 % Fe 17.56 % FeO |
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Phosphorus 15.14 % P 34.70 % P2O5 |
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Hydrogen 1.97 % H 17.62 % H2O |
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Oxygen 46.93 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Fe2+Zr(PO4)2•4(H2O) |
Environment: |
Secondary mineral on bladed kolbeckite in pyroxenite vanadium ores. |
IMA Status: |
Approved IMA 1993 |
Locality: |
Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA. Link to MinDat.org Location Data. |
Name Origin: |
Named after Bertha K. Malhmood, long-time secretary and administrative assistant of the Branch of Analytical Laboratories, US Geological Survey. |
Synonym: |
IMA1992-001 |
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IMA2002-D |
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Mahlmoodite |
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Malhmoodite Image |
Images:
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Malhmoodite
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 |
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Malhmoodite Crystallography
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Axial Ratios: |
a:b:c =1.6826:1:3.5369 |
Cell Dimensions: |
a = 9.12, b = 5.42, c = 19.17, Z = 4; beta = 94.8° V = 944.26 Den(Calc)= 2.88 |
Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c |
X Ray Diffraction: |
By Intensity(I/Io): 3.16(1), 4.382(0.8), 9.58(0.75), |
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Physical Properties of Malhmoodite
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Cleavage: |
{???} Good |
Color: |
Cream white. |
Diaphaneity: |
Transparent to Translucent |
Hardness: |
3 - Calcite |
Luster: |
Silky |
Streak: |
white |
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Optical Properties of Malhmoodite
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Gladstone-Dale: |
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.225,KC= 0.22 Ncalc = 1.63 |
Optical Data: |
Biaxial (-), a=1.64, b=1.652, g=1.652, bire=0.0120, 2V(Calc)=0, 2V(Meas)=0. |
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Calculated Properties of Malhmoodite
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Electron Density: |
Bulk Density (Electron Density)=2.82 gm/cc note: Specific Gravity of Malhmoodite =2.88 gm/cc. |
Fermion Index: |
Fermion Index = 0.02 Boson Index = 0.98 |
Photoelectric: |
PEMalhmoodite = 34.16 barns/electron U=PEMalhmoodite x rElectron Density= 96.19 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Malhmoodite is Not Radioactive |
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Malhmoodite Classification
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Dana Class: |
40.01.05.01 (40)Hydrated Phosphates, etc |
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(40.01)where A++ B++ (XO4) � x(H2O) |
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(40.01.05)Dana Group |
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40.01.05.01 Malhmoodite FeZr(PO4)2•4(H2O) P 21/c 2/m |
Strunz Class: |
08.CE.75 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.C - Phosphates without Additional Anions, with H2O |
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08.CE -With only medium-sized cations, RO4:H2O � 1:2.5 |
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08.CE.75 Malhmoodite FeZr(PO4)2•4(H2O) P 21/c 2/m |
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08.CE.75 IMA2008-046! MgZr(PO4)2•4H2O P1 1 |
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Other Malhmoodite Information
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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) |
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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Print or Cut-and-Paste your Malhmoodite Specimen Label here :
Malhmoodite
FeZr(PO4)2•4(H2O)
Dana No: 40.01.05.01 Strunz No: 08.CE.75
Locality:
Notes:
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