Dickinsonite-(KMnNa) Mineral Data

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General Dickinsonite-(KMnNa) Information

Chemical Formula:

KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2

Composition:

Molecular Weight = 2,117.87 gm

Potassium 0.92 % K 1.11 % K₂O

Barium 0.06 % Ba 0.07 % BaO

Sodium 6.27 % Na 8.46 % Na₂O

Strontium 0.21 % Sr 0.24 % SrO

Lithium 0.10 % Li 0.22 % Li₂O

Calcium 0.97 % Ca 1.35 % CaO

Magnesium 0.07 % Mg 0.11 % MgO

Titanium 0.02 % Ti 0.04 % TiO₂

Manganese 25.16 % Mn 32.49 % MnO

Aluminum 1.16 % Al 2.19 % Al₂O₃

Zinc 0.03 % Zn 0.04 % ZnO

Iron 10.05 % Fe 12.62 % FeO / 0.34 % Fe₂O₃

Silicon 0.01 % Si 0.03 % SiO₂

Phosphorus 17.58 % P 40.28 % P₂O₅

Hydrogen 0.10 % H 0.93 % H₂O

Lead 0.10 % Pb 0.11 % PbO

Oxygen 37.15 % O

Fluorine 0.03 % F 0.03 % F

- % F -0.01 % -O=F₂

______ ______

100.00 % 100.64 % = TOTAL OXIDE

Empirical Formula:

K_0.5Na_5.78Ca_0.51Sr_0.05Ba_0.01Pb_0.01Mn²⁺_9.7Fe²⁺_3.72Li_0.31Mg_0.06Zn_0.01Al_0.91Fe³⁺_0.09 Ti_0.01(OH)_1.97F_0.03P_12.02Si_0.01O₄₇(OH)_0.21

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Branchville, Fairfield Co., Connecticut, USA Link to MinDat.org Location Data.

Name Origin:

Named after dickinsonite and site occupancy of the arrojadite-dickensonite structure.

Name Pronunciation:

Dickinsonite-(KMnNa) + Pronunciation

Synonym:

Dickinsonite

IMA2005-048

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Dickinsonite-(KMnNa) Crystallography

Axial Ratios:

a:b:c =1.6522:1:2.4625

Cell Dimensions:

a = 16.69, b = 10.1013, c = 24.8752, Z = 4; beta = 105.616° V = 4,038.93 Den(Calc)= 3.48

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cc

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

By Intensity(I/I_o): 3.0623(1), 3.0646(1), 2.7299(0.891),2.7304(0.891), 3.2447(0.327), 2.7785(0.286), 2.5702(0.27), 5.9715(0.268), 2.7875(0.266),

Crystal Structure:

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Moore P B , Araki T , Merlino S , Mellini M , Zanazzi P F , American Mineralogist , 66 (1981) p.1034-1049, The arrojadite-dickinsonite series, KNa4Ca(Fe,Mn)14Al(OH)2(PO4)12:, crystal structure and crystal chemistry, sample BR, Locality: Branchville, Connecticut, USA

Physical Properties of Dickinsonite-(KMnNa)

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Optical Properties of Dickinsonite-(KMnNa)

Optical Data:

NCalc= 1.67 - from Gladstone-Dale relationship (KC = 0.1931) where Ncalc=Dcalc*KC+1

Calculated Properties of Dickinsonite-(KMnNa)

Electron Density:

Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Dickinsonite-(KMnNa) =3.48 gm/cc.

Fermion Index:

Fermion Index = 0.0029922499
Boson Index = 0.9970077501

Photoelectric:

PE_{Dickinsonite-(KMnNa)}= 12.78 barns/electron
U=PE_{Dickinsonite-(KMnNa)} x r_electron= 42.76 barns/cc.

Radioactivity:

GRapi = 12.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Dickinsonite-(KMnNa) per GRapi unit = 7.80 (%)

Estimated Radioactivity from Dickinsonite-(KMnNa) - barely detectable

Dickinsonite-(KMnNa) Classification

Dana Class:

41.07.02d.01 (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

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-(KMnNa) Information

References:

NAME( AmMin, v91, p1266) PHYS. PROP.(AmMin, v91, p1249)

See Also:

Links to other databases for Dickinsonite-(KMnNa) :
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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Dickinsonite-(KMnNa)

KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2
Dana No: 41.07.02d.01 Strunz No: 08.BF.05
Locality:

Notes: