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Dickinsonite-(KMnNa)

A valid IMA mineral species - grandfathered
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08852410014947533964054.jpg
Dickinsonite-(KMnNa)

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
02634010015859301452478.jpg
Dickinsonite-(KMnNa), etc.

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
01760370015726502435580.jpg
Dickinsonite-(KMnNa), etc.

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
08852410014947533964054.jpg
Dickinsonite-(KMnNa)

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
05514400015728929646467.jpg
Dickinsonite-(KMnNa), etc.

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
03825040015725486086647.jpg
Dickinsonite-(KMnNa), etc.

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
08852410014947533964054.jpg
Dickinsonite-(KMnNa)

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
05514400015728929646467.jpg
Dickinsonite-(KMnNa), etc.

Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
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About Dickinsonite-(KMnNa)Hide

03295650014947534039950.jpg
John William Dickinson
Formula:
(KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2
Colour:
Green shades to dark green, yellowish green, brownish green; green in transmitted light.
Lustre:
Vitreous, Pearly
Hardness:
3½ - 4
Specific Gravity:
3.38 - 3.41
Crystal System:
Monoclinic
Name:
Originally named simply dickinsonite, after the Reverend John William Dickinson (1835-1899) of Redding, Connecticut, USA, who collected minerals of the area and drew attention to them. The suffix was added in 2006 during a reorganization and nomenclature change for the arrojadite group (Chopin et al. 2006).
Arrojadite Group. Arrojadite-(KFe)-Dickinsonite-(KMnNa) Series. First group member with essential Mn (compare manganoarrojadite-(KNa)).

Dickinsonite group.

Note: Mücke & Keck describe "Dickinsonite-(NaMn)" and "Dickinsonite-(KMn)" from Hagendorf-Süd, on the basis of EPMA data.
Ba- and Pb-dominant members are reported from Szklary pegmatite, Poland. See Unnamed (Ba-dominant member of dickinsonite group) and Unnamed (Pb-dominant member of dickinsonite group).


Unique IdentifiersHide

Mindat ID:
1286
Long-form identifier:
mindat:1:1:1286:3
GUID
(UUID V4):
dd13ce8a-f873-4e48-9779-2dd94008586e

IMA Classification of Dickinsonite-(KMnNa)Hide

Classification of Dickinsonite-(KMnNa)Hide

Strunz-mindat (2024):
8.BF.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
Dana 8th ed.:
41.7.2.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)7(XO4)4Zq
Hey's CIM Ref.:
19.12.33

19 : Phosphates
12 : Phosphates of Mn

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
Dcn-KMnNaIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
DcnThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Dickinsonite-(KMnNa)Hide

Lustre:
Vitreous, Pearly
Transparency:
Transparent, Translucent
Comment:
Lustre somewhat pearly on the cleavage.
Colour:
Green shades to dark green, yellowish green, brownish green; green in transmitted light.
Streak:
Nearly white
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Very brittle
Cleavage:
Perfect
On {001}, perfect (almost micaceous).
Fracture:
Irregular/Uneven
Density:
3.38 - 3.41 g/cm3 (Measured)    3.42 g/cm3 (Calculated)
Comment:
Measured end values on Branchville (3.41) and Poland, Maine (3.38) materials.

Optical Data of Dickinsonite-(KMnNa)Hide

Type:
Biaxial (+)
RI values:
nα = 1.648 - 1.658 nβ = 1.655 - 1.662 nγ = 1.662 - 1.671
2V:
Measured: 80° to 90°, Calculated: 68° to 88°
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Pleochroism:
Visible
Comments:
X = b = Light olive-green
Y = ^c ~ +15° = Lighter olive-green
Z = Very light yellowish green

Chemistry of Dickinsonite-(KMnNa)Hide

Mindat Formula:
(KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2
Elements listed:
Al, Ca, H, K, Mn, Na, O, P - search for minerals with similar chemistry

Chemical AnalysisHide

Oxide wt%:
 1
P2O539,5 %
Al2O32,0 %
FeO13,3 %
MnO32,0 %
CaO2,3 %
Na2O7,8 %
K2O1,1 %
LiO0,45 %
H2O1,65 %
Total:97 %
Sample references:
IDLocalityReferenceNotes
1Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
Moore, P.B., Ito, J. (1979) Alluaudites, wyllieites, arrojadites: crystal chemistry and nomenclature. Mineralogical Magazine: 43: 227-235.

Crystallography of Dickinsonite-(KMnNa)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 24.94 Å, b = 10.13 Å, c = 16.72 Å
β = 105.6°
Ratio:
a:b:c = 2.462 : 1 : 1.651
Unit Cell V:
4,068.57 ų (Calculated from Unit Cell)
Morphology:
Crystals tabular {001}. Commonly pseudo-rhombohedral in habit. Triangular striations on {001}. Frequently foliated to micaceous; curved lamellar; radiated; stellated; and as disseminated scales.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000848Dickinsonite-(KMnNa)Moore P B, Araki T, Merlino S, Mellini M, Zanazzi P F (1981) The arrojadite-dickinsonite series, KNa4Ca(Fe,Mn)14Al(OH)2(PO4)12: crystal structure and crystal chemistry sample BR American Mineralogist 66 1034-10491981Branchville, Connecticut, USA0293
0004192Dickinsonite-(KMnNa)Camara F, Oberti R, Chopin C, Medenbach O (2006) The arrojadite enigma: I. A new formula and a new model for the arrojadite structure American Mineralogist 91 1249-125920060293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.06 Å(100)
2.73 Å(89)
3.245 Å(33)
2.778 Å(29)
5.972 Å(27)
2.868 Å(27)
2.788 Å(27)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites
Geological Setting:
Pegmatites

Type Occurrence of Dickinsonite-(KMnNa)Hide

Type Locality:
ⓘ Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield County, Connecticut, USA
Place of Conservation of Type Material:
Muséum Nationale d’Histoire Naturelle, Paris, France, 7841.
Ecole Nationale Supérieure des Mines, Paris, France, number ENSMP 4861.
Geological Setting of Type Material:
Pegmatite
Associated Minerals at Type Locality:
TriploiditeRhodochrositeReddingiteLithiophiliteFairfieldite
Eosphorite
Reference:
Brush, G.J., Dana, E.S. (1878) On a new and remarkable mineral locality in Fairfield County, Connecticut; with a description of several new species occurring there. First Paper. American Journal of Science and Arts: 116: 33-46; 114-123.
Download:
https://rruff.info/rruff_1.0/uploads/AJS16_33.pdf

Synonyms of Dickinsonite-(KMnNa)Hide

Other Language Names for Dickinsonite-(KMnNa)Hide

Relationship of Dickinsonite-(KMnNa) to other SpeciesHide

Member of:
Arrojadite Group
Other Members of this group:
Arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. 2/m : B2/b
Arrojadite-(KFe)(KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Arrojadite-(KFeNa)(KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2
Arrojadite-(KNa)(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Arrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2
Arrojadite-(PbFe)(Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Arrojadite-(SrFe)(Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Ferri-arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2
Fluorarrojadite-(BaFe)(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
Fluorarrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
Fluorarrojadite-(KNa)(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
Fluorarrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
Fluorcarmoite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2Mon. m : Bb
Manganoarrojadite-(KNa)(KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Sigismundite(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Forms a series with:
Arrojadite-(KFe)Arrojadite-(KFe)-Dickinsonite-(KMnNa) Series

Common AssociatesHide

Associated Minerals Based on Photo Data:
9 photos of Dickinsonite-(KMnNa) associated with Reddingite(Mn2+,Fe2+)3(PO4)2 · 3H2O
8 photos of Dickinsonite-(KMnNa) associated with RhodochrositeMnCO3
7 photos of Dickinsonite-(KMnNa) associated with TriploiditeMn2+2(PO4)(OH)
7 photos of Dickinsonite-(KMnNa) associated with QuartzSiO2
6 photos of Dickinsonite-(KMnNa) associated with LithiophiliteLiMn2+PO4
5 photos of Dickinsonite-(KMnNa) associated with FairfielditeCa2Mn2+(PO4)2 · 2H2O
2 photos of Dickinsonite-(KMnNa) associated with FillowiteNa3CaMn2+11(PO4)9
2 photos of Dickinsonite-(KMnNa) associated with DiadochiteFe3+2(PO4)(SO4)(OH) · 6H2O
2 photos of Dickinsonite-(KMnNa) associated with PurpuriteMn3+(PO4)
1 photo of Dickinsonite-(KMnNa) associated with SpodumeneLiAlSi2O6

Related Minerals - Strunz-mindat GroupingHide

8.BF.Sigismundite(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.Manganoarrojadite-(KNa)(KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Arrojadite-(KFe)(KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Arrojadite-(SrFe)(Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Arrojadite-(KNa)(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Arrojadite-(PbFe)(Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Fluorarrojadite-(BaFe)(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
8.BF.05Arrojadite-(KFeNa)(KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2
8.BF.05Arrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2
8.BF.05Arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. 2/m : B2/b
8.BF.05Ferri-arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2
8.BF.05Fluorarrojadite-(KNa)(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
8.BF.05Fluorarrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
8.BF.05Fluorcarmoite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2Mon. m : Bb
8.BF.05Unnamed (Ba-dominant member of dickinsonite group)
8.BF.05Unnamed (Pb-dominant member of dickinsonite group)
8.BF.05Fluorarrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
8.BF.10Samuelsonite(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2Mon. 2/m : B2/m
8.BF.15GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8Iso. m3 (2/m 3) : Pa3
8.BF.20NabiasiteBaMn9(VO4)6(OH)2Iso. m3 (2/m 3) : Pa3
8.BF.25StarovaiteKCu5O(VO4)3 Tric. 1 : P1
8.BF.30Achyrophanite(K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5Orth. 2 2 2 : P2 2 21
8.BF.35CryptochalciteK2Cu5O(SO4)5Tric. 1 : P1
8.BF.35CesiodymiteCsKCu5O(SO4)5Tric. 1 : P1

Other InformationHide

Thermal Behaviour:
In a closed tube gives water; the residue is magnetic. Fuses easily.
Notes:
Soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Dickinsonite-(KMnNa)Hide

References for Dickinsonite-(KMnNa)Hide

Reference List:
Brush, G.J., Dana, E.S. (1878) On a new and remarkable mineral locality in Fairfield County, Connecticut; with a description of several new species occurring there. First Paper. American Journal of Science and Arts: 116: 33-46; 114-123. (as Dickinsonite).
Brush, G.J., Dana, E.S. (1878) On a new and remarkable mineral locality in Fairfield County, Connecticut; with a description of several new species occurring there. First Paper. American Journal of Science and Arts: 116: 33-46; 114-123.
Brush, G.J., Dana, E.S., Wells, H.L. (1890) On the mineral locality at Branchville, Connecticut: Fifth paper. American Journal of Science: 39: 201-216 (213).
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin Vol. 679. US Geological Survey doi:10.3133/b679 p.68
Berman, H., Gonyer, F.A. (1930) Pegmatite minerals of Poland, Maine. American Mineralogist: 15: 375-387.
Wolfe, C. W. (1941) The unit cell of dickinsonite. American Mineralogist, 26 (5) 338-342
Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.pp.717-719 - as Dickinsonite
Moore, Paul B., Araki, Takaharu, Merlino, Stefano, Mellini, Marcello, Zanazzi, and Pier Francesco (1981) The arrojadite-dickinsonite series, KNa4Ca(Fe,Mn)2+14Al(OH)2(PO4)14: crystal structure and crystal chemistry. American Mineralogist, 66 (9-10) 1034-1049
Cámara, F., Oberti, R., Chopin, C., Medenbach, O. (2006): The arrojadite enigma: I. A new formula and a new model for the arrojadite structure. American Mineralogist: 91: 1249-1259.
CHOPIN, C., OBERTI, R., CÁMARA, F. (2006): The arrojadite enigma: II. Compositional space, new members and nomenclature of the group. American Mineralogist, 91, 1260-1270.
Mücke, A., Keck, E. (2011): Karbonate aus dem Pegmatit von Hagendorf-Süd/Opf.: Zusammensetzung, Verbreitung und begleitende Phosphat-Mineralien (Apatit, Hagendorfit und Eosphorit-Gruppe) - darunter einige Neufunde (Triplit, Mineralien der Arrojadit-Dickinsonit Reihe, Goyazit und Variscit). Aufschluss: 62: 87-117.
(2023) Dickinsonite-(KMnNa) Handbook of Mineralogy. Mineralogical Society of America

Localities for Dickinsonite-(KMnNa)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina
 
  • Salta Province
    • La Poma Department
      • El Quemado mining district
Galliski et al. (2002)
  • San Luis Province
    • San Martín Department
Roda-Robles et al. (2012)
Australia
 
  • South Australia
    • Olary Province
      • Boolcoomatta Reserve (Boolcoomata Station)
Record of Sth.Aust. mines summary Olary ...
Canada
 
  • Manitoba
    • Cross Lake
      • North Group
Ercit et al. (2010)
Czech Republic
 
  • Plzeň Region
    • Domažlice District
      • Otov
Masau +2 other references
Namibia
 
  • Erongo Region
    • Karibib Constituency
      • Okongava Ost Farm 72
Keller et al. (2007)
Poland
 
  • Lower Silesian Voivodeship
    • Świdnica County
      • Gmina Świdnica
Pieczka et al. (2015)
    • Ząbkowice Śląskie County
      • Gmina Ząbkowice Śląskie
        • Szklary
Pieczka et al. (2018) +1 other reference
USA
 
  • Arizona
    • Yavapai County
London et al. (1982)
  • Connecticut
    • Fairfield County
Januzzi et al. (1976)
Januzzi (1994)
      • Redding (Reading)
        • Branchville
Brush and Dana (1878) +5 other references
    • Middlesex County
      • Portland
        • Collins Hill
          • Strickland pegmatite
Schairer (1926) +1 other reference
  • Maine
    • Androscoggin County
      • Auburn
        • East Mount Apatite Mining District
Thompson et al. (1998)
        • West Mount Apatite Mining District
      • Poland
King et al. (1994) +1 other reference
    • Oxford County
      • Greenwood
Thompson et al. (1998)
        • Uncle Tom Mountain
Falster et al. (2019)
      • Hebron
        • Mount Rubellite
King (n.d.)
      • Newry
King et al. (6)
      • Paris
Found during study of Ryerson Hill ...
      • Rumford
Guidebook 1 to Mineral Collecting in ...
  • New Hampshire
    • Cheshire County
      • Alstead
Smith (2005)
Robert Whitmore collection
    • Grafton County
      • Alexandria
Smith (2005)
      • Groton
Smith (2005)
The following references are in error. ... +2 other references
    • Sullivan County
      • Newport
Smith (2005)
  • North Carolina
    • Gaston County
  • South Dakota
    • Pennington County
      • Keystone Mining District
        • Keystone
Seaman (1976)
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