Mangangordonite Mineral Data

General Mangangordonite Information

Chemical Formula:

(Mn++,Fe++,Mg)Al2(PO4)2(OH)2•8(H2O)

Composition:

Molecular Weight = 480.92 gm

Magnesium 0.20 % Mg 0.34 % MgO

Manganese 8.00 % Mn 10.33 % MnO

Aluminum 11.78 % Al 22.26 % Al₂O₃

Iron 3.48 % Fe 4.48 % FeO

Phosphorus 12.88 % P 29.51 % P₂O₅

Hydrogen 3.77 % H 33.71 % H₂O

Oxygen 59.88 % O

______ ______

100.00 % 100.63 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.7Fe²⁺_0.3Mg_0.04Al_2.1(PO₄)₂(OH)₂ï¿½8(H₂O)

Environment:

Secondary mineral in complex zoned granite pegmatites.

IMA Status:

Approved IMA 1991

Locality:

Foote Quarry, Kings Mountain, Cleveland County, North Carolina, USA. Link to MinDat.org Location Data.

Name Origin:

Named as the manganese analog of gordonite.

Name Pronunciation:

Mangangordonite + Pronunciation

Synonym:

ICSD 63248

IMA1989-023

PDF 45-1409

Mangangordonite Image

Images:

Mangangordonite

Comments: White, blocky crystal of mangangordonite to 0.5mm on matrix.
Location: Foote mine, Cleveland Co., North Carolina, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Mangangordonite Crystallography

Axial Ratios:

a:b:c =0.5072:1:0.6793

Cell Dimensions:

a = 5.257, b = 10.363, c = 7.04, Z = 1; alpha = 105.44°, beta = 113.07°, gamma = 78.69° V = 333.52 Den(Calc)= 2.39

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 4.77(1), 6.39(0.8), 3.18(0.7),

Physical Properties of Mangangordonite

Cleavage:

{010} Perfect

Color:

Colorless, White, Light yellow.

Density:

2.36

Diaphaneity:

Transparent

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Mangangordonite

Gladstone-Dale:

CI meas= 0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2384,KPDmeas= 0.2384,KC= 0.2442
Ncalc = 1.58

Optical Data:

Biaxial (+), a=1.556, b=1.561, g=1.571, bire=0.0150, 2V(Calc)=72, 2V(Meas)=70-71.

Calculated Properties of Mangangordonite

Electron Density:

Bulk Density (Electron Density)=2.41 gm/cc
note: Specific Gravity of Mangangordonite =2.36 gm/cc.

Fermion Index:

Fermion Index = 0.0012337987
Boson Index = 0.9987662013

Photoelectric:

PE_{Mangangordonite}= 3.99 barns/electron
U=PE_{Mangangordonite} x rElectron Density= 9.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mangangordonite is Not Radioactive

Mangangordonite Classification

Dana Class:

42.11.14.05 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq ï¿½ x(H2O)

(42.11.14)Vauxite Group

42.11.14.01 Vauxite FeAl2(PO4)2(OH)2•6(H2O) P1 1

42.11.14.02 Paravauxite FeAl2(PO4)2(OH)2•8(H2O) P1 1

42.11.14.03 Sigloite FeAl2(PO4)2(OH)3•5(H2O) P1 1

42.11.14.04 Gordonite MgAl2(PO4)2(OH)2•8(H2O) P1 1

42.11.14.05 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1

42.11.14.06 Kastningite! (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1

42.11.14.07 Maghrebite! MgAl2(AsO4)2(OH)2•8H2O P1 1

Strunz Class:

08.DC.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

08.DC.30 Gordonite MgAl2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Ferrolaueite! FeFe2(PO4)2(OH)2•8(H2O) Tri

08.DC.30 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Laueite MnFe2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Sigloite FeAl2(PO4)2(OH)3•5(H2O) P1 1

08.DC.30 Pseudolaueite MnFe2(PO4)2(OH)2•7-8(H2O) P 2₁/a 2/m

08.DC.30 Paravauxite FeAl2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Stewartite MnFe2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Ushkovite MgFe2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Kastningite! (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1

08.DC.30 Maghrebite! MgAl2(AsO4)2(OH)2•8H2O P1 1

Other Mangangordonite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.76,p2022,1991) OPTIC PROP.(Am.Min.,Vol.76,p2022,1991)

See Also:

Links to other databases for Mangangordonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Mangangordonite

(Mn++,Fe++,Mg)Al2(PO4)2(OH)2•8(H2O)
Dana No: 42.11.14.05 Strunz No: 08.DC.30
Locality:

Notes:

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