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Dickinsonite Mineral Data

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General Dickinsonite Information

Help on Chemical  Formula: Chemical Formula: KNa4Ca(Mn++,Fe++)14Al(PO4)12(OH)2
Help on Composition: Composition: Molecular Weight = 2,132.64 gm
   Potassium    0.92 %  K     1.10 % K2O
   Sodium       5.71 %  Na    7.70 % Na2O
   Lithium      0.07 %  Li    0.14 % Li2O
   Calcium      1.69 %  Ca    2.37 % CaO
   Manganese   24.73 %  Mn   31.93 % MnO
   Aluminum     1.01 %  Al    1.91 % Al2O3
   Iron        10.21 %  Fe   13.14 % FeO
   Phosphorus  17.14 %  P    39.27 % P2O5
   Hydrogen     0.18 %  H     1.65 % H2O
   Oxygen      38.34 %  O
              ______        ______ 
              100.00 %       99.21 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.5Li0.2Na5.3Ca0.9Mn2+9.6Fe2+3.9Al0.8(PO4)11.8(OH)3.9
Help on Environment: Environment: High temperature (800 deg C) primary mineral in granite pegmatites.
Help on IMA Status: IMA Status: Discredited IMA 2005 - Dana # Changed from 41.7.2.2
Help on Locality: Locality: Branchville, Fairfield County, Connecticut, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Reverend John William Dickinson (1835-1899), Redding, Connecticut, USA, an early collector of Branchville minerals. Dickinsonite is now the group name.
Help on Name Pronunciation: Name Pronunciation: Dickinsonite + Pronunciation Say DICKINSONITE
Help on Synonym: Synonym: ICSD 100870
  PDF 43-1466
 

Dickinsonite Image

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  Dickinsonite

Comments: Salmon-colored, crystalline dickinsonite.
Location: Branchville, Fairfield County, Connecticut, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dickinsonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.6783:1:2.4814
Help on Cell Dimensions: Cell Dimensions: a = 16.7, b = 9.95, c = 24.69, Z = 4; beta = 104.783° V = 3,966.81 Den(Calc)= 3.57
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.05(1), 2.72(0.9), 3.22(0.7),
Help on Forms: Forms:

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Drag2 - Resize

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Help on Above

Forms: ( 1 0 2) ( 1 1 0) ( 1 0 2) ( 1 1 1) ( 1 0 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.

 

Physical Properties of Dickinsonite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brownish green, Green, Yellow green.
Help on Density: Density: 3.34
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Dickinsonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1847,KPDmeas= 0.1974,KC= 0.1912
Ncalc = 1.64 - 1.68
Help on Optical Data: Optical Data: Biaxial (+), a=1.648-1.658, b=1.655-1.662, g=1.662-1.671, bire=0.0130-0.0140, 2V(Calc)=68-88, 2V(Meas)=80-90. Dispersion relatively strong.
Help on Pleochroism (x): Pleochroism (x): pale olive green.
Help on Pleochroism (y): Pleochroism (y): paler olive green.
Help on Pleochroism (z): Pleochroism (z): very pale yellow green.
 

Calculated Properties of Dickinsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Dickinsonite =3.34 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024221687
Boson Index = 0.9975778313
Help on Photoelectric: Photoelectric: PEDickinsonite = 10.68 barns/electron
U=PEDickinsonite x relectron= 34.38 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 12.76 (Gamma Ray American Petroleum Institute Units)
Concentration of Dickinsonite per GRapi unit = 7.84 (%)

Estimated Radioactivity from Dickinsonite - barely detectable

 

Dickinsonite Classification

Help on  Dana Class: Dana Class: 41.07.02d.00 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.07)where (A B)m (XO4)4 Zq
  (41.07.02d)Arrojadite Group (Ferri-arrojadite Subgroup) (Fe in Al site, OH in W site, Fe in M site)
 
41.07.02d.00 Dickinsonite? KNa4Ca(Mn,Fe)14Al(PO4)12(OH)2 Cc m
 
41.07.02d.01 Dickinsonite-(KMnNa)! KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 
41.07.02d.02 Dickinsonite-(KNaNa)! KNaNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 
41.07.02d.03 Dickinsonite-(KNa)! KNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 
41.07.02d.04 Dickinsonite-(NaNa)! Na2Na4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
Help on  Strunz Class: Strunz Class: 08.BF.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1
 
08.BF.05 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m
 
08.BF.05 Dickinsonite! KNa4Ca(Mn,Fe)14Al(PO4)12(OH)2 Cc m
 
08.BF.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Dickinsonite-(KNa)! KNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 
08.BF.05 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Fluorarrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m
 
08.BF.05 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
08.BF.05 Fluorarrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m
 
08.BF.05 Fluorarrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2 Cc m
 
08.BF.05 Ferri-arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m
 
08.BF.05 Dickinsonite-(KMnNa)! KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 
08.BF.05 Dickinsonite-(KNaNa)! KNaNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 
08.BF.05 Dickinsonite-(NaNa)! Na2Na4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m
 

Other Dickinsonite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Dickinsonite :
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
15 - WWW-MINCRYST

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

Dickinsonite

KNa4Ca(Mn++,Fe++)14Al(PO4)12(OH)2
Dana No: 41.07.02d.00 Strunz No: 08.BF.05
Locality:

 

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