Mangangordonite Mineral Data

Mangangordonite Mineral Data +

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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)₂·8(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.

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 - PinacoidalH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Leavens P B , Rheingold A L , Neues Jahrbuch fur Mineralogie, Monatshefte , 1988 (1988) p.265-270, Crystal structures of gordonite, MgAl2(PO4)2(OH)2(H2O)6*2H2O, and its Mn analog

Physical Properties of Mangangordonite

Cleavage:

[010] Perfect

Color:

Colorless, White, Light yellow.

Density:

2.36

Diaphaniety:

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= 0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2354,KPDmeas= 0.2384,KC= 0.2442

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:

r_electron=2.41 gm/cc
note: r_{Mangangordonite}=2.36 gm/cc.

Fermion Index

Fermion Index = 0.00123
Boson Index = 0.99877

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mangangordonite is Not Radioactive

Mangangordonite Classification

Dana Class:

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

(42.11)where (AB)4 (XO4)3 Zq · x(H2O)

(42.11.14)Dana Group

42.11.14.1 Vauxite FeAl2(PO4)2(OH)2·6(H2O) P1 1

42.11.14.2 Paravauxite FeAl2(PO4)2(OH)2·8(H2O) P1 1

42.11.14.3 Sigloite FeAl2(PO4)2(OH)3·5(H2O) P1 1

42.11.14.4 Gordonite MgAl2(PO4)2(OH)2·8(H2O) P1 1

42.11.14.5 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2·8(H2O) P1 1

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

Strunz Class:

VII/D.10-35 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.10 - Paravauxite group

VII/D.10-10 Gordonite MgAl2(PO4)2(OH)2·8(H2O) P1 1

VII/D.10-20 Ushkovite MgFe2(PO4)2(OH)2·8(H2O) P1 1

VII/D.10-30 Paravauxite FeAl2(PO4)2(OH)2·8(H2O) P1 1

VII/D.10-35 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2·8(H2O) P1 1

VII/D.10-40 Sigloite FeAl2(PO4)2(OH)3·5(H2O) P1 1

VII/D.10-45 Ferrolaueite! FeFe2(PO4)2(OH)2·8(H2O) Tri

VII/D.10-50 Laueite MnFe2(PO4)2(OH)2·8(H2O) 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Mangangordonite Specimen Label here :

Mangangordonite

(Mn++,Fe++,Mg)Al2(PO4)2(OH)2·8(H2O)
Dana No: 42.11.14.5 Strunz No: VII/D.10-35
Locality:

Notes: