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Reddingite Mineral Data

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General Reddingite Information

Help on Chemical  Formula: Chemical Formula: Mn++3(PO4)2•3(H2O)
Help on Composition: Composition: Molecular Weight = 408.80 gm
   Manganese   40.32 %  Mn   52.06 % MnO
   Phosphorus  15.15 %  P    34.72 % P2O5
   Hydrogen     1.48 %  H    13.22 % H2O
   Oxygen      43.05 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+3(PO4)2•3(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1878
Help on Locality: Locality: Branchville, in the town of Redding, Fairfield Co., Connecticut. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Reddingite + Pronunciation Say REDDINGITE
 

Reddingite Image

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  Reddingite

Comments: Opaque brown crystalline reddingite.
Location: Tip Top Quarry, Custer County, South Dakota, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Reddingite

Comments: Brown crystals of reddingite on matrix.
Location: Boa Vista creek, Minas Gerais, Brazil. Scale: Crystal size 1 mm.
© Sandro Maggia/Minernet.it

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  Reddingite

Comments: Golden brown to brown, highly lustrous, pseudo-octahedral crystals of reddinite.
Location: Cigana mine, Galileia, Minas Gerais, Brazil. Scale: Crystal size 0.5 mm.
© Tom Loomis / Dakota Matrix

Reddingite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9414:1:0.863
Help on Cell Dimensions: Cell Dimensions: a = 9.49, b = 10.08, c = 8.7, Z = 4; V = 832.23 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbna
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.2(1), 2.737(0.8), 4.28(0.7),
Help on Forms: Forms:

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Drag2 - Resize

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Help on Above

Forms: ( 2 1 2) ( 1 1 1) ( 3 2 2) ( 3 1 1) ( 1 2 2)

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Physical Properties of Reddingite

Help on Cleavage: Cleavage: {010} Indistinct
Help on Color: Color: White, Yellowish white, Colorless, Reddish brown, Dark brown.
Help on Density: Density: 3.1
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white
 

Optical Properties of Reddingite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2031,KPDmeas= 0.2135,KC= 0.211
Ncalc = 1.65 - 1.69
Help on Optical Data: Optical Data: Biaxial (+), a=1.643-1.658, b=1.648-1.664, g=1.674-1.685, bire=0.0270-0.0310, 2V(Calc)=48-58, 2V(Meas)=41-65. Dispersion strong, r > v.
 

Calculated Properties of Reddingite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.02 gm/cc
note: Specific Gravity of Reddingite =3.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002088635
Boson Index = 0.9997911365
Help on Photoelectric: Photoelectric: PEReddingite = 11.00 barns/electron
U=PEReddingite x rElectron Density= 33.20 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Reddingite is Not Radioactive
 

Reddingite Classification

Help on  Dana Class: Dana Class: 40.03.02.03 (40)Hydrated Phosphates, etc
  (40.03)where (A++)3 (XO4)2 � x(H2O)
  (40.03.02)Phosphoferrite Group
 
40.03.02.01 Phosphoferrite (Fe,Mn)3(PO4)2•3(H2O) Pmna 2/m 2/m 2/m
 
40.03.02.02 Kryzhanovskite MnFe2(PO4)2(OH)2•(H2O) Pbna 2/m 2/m 2/m
 
40.03.02.03 Reddingite Mn3(PO4)2•3(H2O) Pbna 2/m 2/m 2/m
 
40.03.02.04 Landesite (Mn,Mg)9Fe3(PO4)8(OH)3•9(H2O) Pmna 2/m 2/m 2/m
 
40.03.02.05 Garyansellite (Mg,Fe)3(PO4)2(OH,O)•1,5(H2O) Pbna 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CC.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CC -With only medium-sized cations, RO4:H2O = 1:1.5
 
08.CC.05 Garyansellite (Mg,Fe)3(PO4)2(OH,O)•1,5(H2O) Pbna 2/m 2/m 2/m
 
08.CC.05 Kryzhanovskite MnFe2(PO4)2(OH)2•(H2O) Pbna 2/m 2/m 2/m
 
08.CC.05 Landesite (Mn,Mg)9Fe3(PO4)8(OH)3•9(H2O) Pmna 2/m 2/m 2/m
 
08.CC.05 Phosphoferrite (Fe,Mn)3(PO4)2•3(H2O) Pmna 2/m 2/m 2/m
 
08.CC.05 Reddingite Mn3(PO4)2•3(H2O) Pbna 2/m 2/m 2/m
 

Other Reddingite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Reddingite :
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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Print or Cut-and-Paste your Reddingite Specimen Label here :

Reddingite

Mn++3(PO4)2•3(H2O)
Dana No: 40.03.02.03 Strunz No: 08.CC.05
Locality:

 

Notes:

 

 
   
 


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