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Dickinsonite-(KMnNa)

Big Photo

Branchville, Fairfield Co., Connecticut, USA
© C. Stefano '08

Formula:
{KNa}{Mn
2+
 
[ ]}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}[(OH)
 
2
|(PO
 
4
)
 
12
]
System:MonoclinicColour:Green shades to dark ...
Hardness:3½ - 4
Name:After the Reverend William Dickinson, formerly of Redding, Connecticut, USA, who collected minerals of the area and drew attention to them.


Arrojadite Group. Arrojadite-(KFe)-Dickinsonite-(KMnNa) Series.

Classification of Dickinsonite-(KMnNa)

IMA status:Approved 2005
Explanation of status:Redefinition after the new arrojadite nomeclature (CNMMN 05-D, October 2005)
Strunz 8th edition ID:7/B.20-20
Nickel-Strunz 10th (pending) edition ID: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 edition ID: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
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Type Occurrence of Dickinsonite-(KMnNa)

Type Locality:Branchville Mica mine (Branchville Quarry; Fillow Quarry), Branchville, Fairfield Co., Connecticut, USA
Year of Discovery:1878
Geological Setting of type material:Pegmatite
Associated Minerals at type locality:
TriploiditeRhodochrositeReddingiteLithiophiliteFairfieldite
Eosphorite

Occurrences of Dickinsonite-(KMnNa)

Geological Setting:Pegmatites

Physical Properties of Dickinsonite-(KMnNa)

Lustre:Vitreous, Pearly
Diaphaneity (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 (Mohs):3½ - 4
Tenacity:Very brittle
Cleavage:Perfect
On {001}, perfect (almost micaceous).
Fracture:Irregular/Uneven
Density (measured):3.38 - 3.41 g/cm3
Density (calculated):3.42 g/cm3
Comment:Measured end values on Branchville (3.41) and Poland, Maine (3.38) materials.

Crystallography of Dickinsonite-(KMnNa)

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b (B1 1 2/b) [C2/c] {C1 2/c 1}
Cell Parameters:a = 24.94Å, b = 10.13Å, c = 16.72Å
β = 105.6°
Ratio:a:b:c = 2.462 : 1 : 1.651
Unit Cell Volume: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.

Optical Data of Dickinsonite-(KMnNa)

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°
Maximum Birefringence:δ = 0.014

Chart 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

Chemical Properties of Dickinsonite-(KMnNa)

Formula:
{KNa}{Mn
2+
 
[ ]}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}[(OH)
 
2
|(PO
 
4
)
 
12
]
Essential elements:Al, Fe, H, K, Mn, Na, O, P
All elements listed in formula:Al, Ca, H, K, Mn, Na, O, P

Relationship of Dickinsonite-(KMnNa) to other Species

Series:Forms a series with Arrojadite-(KFe) (see here)
Common Associates:
Lithiophilite
Related Minerals - Nickel-Strunz Grouping):
8.BF.05Arrojadite-(KFe)
{KNa}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(BaFe)
{Ba[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(SrFe)
{Sr[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(PbFe)
{Pb[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Fluorarrojadite-(BaFe)
{Ba[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[F
 
2
|HPO
 
4
|(PO4)
 
11
]
8.BF.05Arrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(BaNa)
{Ba[ ]}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Fluorarrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[F
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Fluorarrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[F
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.10Samuelsonite
(Ca,Ba)Ca
 
8
Fe
2+
2
Mn
2+
2
Al
 
2
[(OH)
 
2
|(PO
 
4
)
 
10
]
8.BF.15Griphite
Na
 
4
Li
 
2
Ca
 
6
(Mn
2+
 
,Fe
2+
 
,Mg)
 
19
Al
 
8
[(F,OH)|(PO
 
4
)
 
3
]
 
8
8.BF.20Nabiasite
BaMn
2+
9
[(OH)
 
2
|(VO
 
4
,AsO
 
4
)
 
6
]
Related Minerals - Hey's Index Grouping:
19.12.1Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
·4H
 
2
O
19.12.2Bermanite
Mn
2+
 
Mn
3+
2
[OH|PO
 
4
]
 
2
 · 4H
 
2
O
19.12.3Natrophilite
NaMn
2+
 
[PO
 
4
]
19.12.4Sidorenkite
Na
 
3
Mn
2+
 
[PO
 
4
|CO
 
3
]
19.12.5Niahite
(NH
 
4
)(Mn
2+
 
,Mg)[PO
 
4
] · H
 
2
O
19.12.6Robertsite
Ca
 
3
Mn
3+
4
[(OH)
 
3
|(PO
 
4
)
 
2
]
 
2
 · 3H
 
2
O
19.12.7Pararobertsite
Ca
 
2
Mn
3+
3
[O
 
2
|(PO
 
4
)
 
3
] · 3H
 
2
O
19.12.8Sinkankasite
H
 
2
Mn
2+
 
Al[OH|(PO
 
4
)
 
2
] · 6H
 
2
O
19.12.9Mangangordonite
Mn
2+
 
Al
 
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.10Heterosite
(Fe
3+
 
,Mn
3+
 
)[PO
 
4
]
19.12.11Purpurite
(Mn
3+
 
,Fe
3+
 
)[PO
 
4
]
19.12.12Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
[OH|PO
 
4
]
19.12.13Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
[OH|PO
 
4
]
19.12.14Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
[OH|PO
 
4
]
 
2
19.12.15Frondelite
Mn
2+
 
Fe
3+
4
[(OH)
 
5
|(PO
 
4
)
 
3
]
19.12.16Rockbridgeite
Fe
2+
 
Fe
3+
4
[(OH)
 
5
|(PO
 
4
)
 
3
]
19.12.17Kryzhanovskite
MnFe
 
2
(PO
 
4
)
 
2
(OH)
 
2
·H
 
2
O
19.12.18Landesite
Mn
2+
3-x
Fe
3+
x
[(OH)
 
x
|(PO
 
4
)
 
2
] · (3-x)H
 
2
O
19.12.19Phosphoferrite
(Fe,Mn)
 
3
(PO
 
4
)
 
2
·3H
 
2
O
19.12.20Reddingite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
·3H
 
2
O
19.12.21Earlshannonite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
·4H
 
2
O
19.12.22Hureaulite
(Mn,Fe)
 
5
H
 
2
(PO
 
4
)
 
4
·4H
 
2
O
19.12.23Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
·7H
 
2
O
19.12.24Laueite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.25Pseudolaueite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.26Strunzite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 6H
 
2
O
19.12.27Stewartite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.28Alluaudite
(Na,Ca)Mn
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(PO
 
4
)
 
3
19.12.29Ferroalluaudite
(Na,Ca)Fe
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)
 
3
19.12.30Fillowite
{Mn
2+
 
}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mn
2+
 
,Fe
2+
 
)
 
43
}[PO
 
4
]
 
36
19.12.31Johnsomervilleite
{Ca}{Na
 
6
[ ]
 
2
}{Ca
 
6
Na
 
2
}{(Fe
2+
 
,Mg,Mn
2+
 
)
 
43
}[PO
 
4
]
 
36
19.12.32Wicksite
NaCa
 
2
(Fe
2+
 
,Mn
2+
 
)
 
4
MgFe
3+
 
[PO
 
4
]
 
6
 · 2H
 
2
O
19.12.34Sarcopside
(Fe
2+
 
,Mn
2+
 
,Mg)
 
3
[PO
 
4
]
 
2
19.12.35Ludlamite
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
·4H
 
2
O
19.12.36Graftonite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
[PO
 
4
]
 
2
19.12.37Wilhelmvierlingite
CaMnFe
3+
 
[OH|(PO
 
4
)
 
2
] · 2H
 
2
O
19.12.38Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
19.12.39Beusite
(Mn
2+
 
,Fe
2+
 
,Ca,Mg)
 
3
[PO
 
4
]
 
2
19.12.40Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
19.12.41Jahnsite-(CaMnFe)
CaMn
2+
 
Fe
2+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.42Jahnsite-(CaMnMn)
CaMn
2+
 
Mn
2+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.43Jahnsite-(CaMnMg)
CaMn
2+
 
(Mg,Fe
2+
 
)
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.44Keckite
(Ca,Mg)(Mn
2+
 
,Zn)
 
2
Fe
3+
3
(PO
 
4
)
 
4
(OH)
 
3
 · 2H
 
2
O
19.12.45Stanfieldite
Ca
 
7
Ca
 
2
Mg
 
9
[PO
 
4
]
 
12
19.12.46Laubmannite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
Fe
3+
6
[(OH)
 
3
|PO
 
4
]
 
4
19.12.47Zodacite
Ca
 
4
Mn
2+
 
Fe
3+
4
[(OH)
 
2
|(PO
 
4
)
 
3
]
 
2
 · 12H
 
2
O
19.12.48Hagendorfite
NaCaMn
2+
 
Fe
2+
2
(PO
 
4
)
 
3
19.12.49Maghagendorfite
NaMn(Mg,Fe,Fe)
 
3
(PO
 
4
)
 
3
19.12.50Varulite
NaCaMn
2+
 
Mn
2+
2
(PO
 
4
)
 
3
19.12.51Griphite
Na
 
4
Li
 
2
Ca
 
6
(Mn
2+
 
,Fe
2+
 
,Mg)
 
19
Al
 
8
[(F,OH)|(PO
 
4
)
 
3
]
 
8
19.12.52Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
[(OH)
 
4
|(SiO
 
4
,PO
 
4
)|(HPO
 
4
,PO
 
4
)
 
3
]
19.12.53Arrojadite-(KFe)
{KNa}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
19.12.54Lun'okite
(Mn,Ca)(Mg,Fe,Mn)Al(PO
 
4
)
 
2
OH·4H
 
2
O
19.12.55Eosphorite
(Mn
2+
 
,Fe
2+
 
)Al[(OH)
 
2
|PO
 
4
] · H
 
2
O
19.12.56Ernstite
(Mn
2+
 
,Fe
3+
 
)Al[(OH,O)
 
2
|PO
 
4
] · H
 
2
O
19.12.57Childrenite
(Fe
2+
 
,Mn
2+
 
)Al[(OH)
 
2
|PO
 
4
] · H
 
2
O
19.12.58Bobfergusonite
Na
 
2
Mn
 
5
FeAl(PO
 
4
)
 
6
19.12.59Qingheiite
NaMn
3+
 
Mg(Al,Fe
3+
 
)[PO
 
4
]
 
3
19.12.60Whiteite-(CaFeMg)
Ca(Fe
2+
 
,Mn
2+
 
)Mg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.61Whiteite-(CaMnMg)
CaMn
2+
 
Mg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.62Whiteite-(MnFeMg)
(Mn
2+
 
,Ca)(Fe
2+
 
,Mn
2+
 
)Mg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.63Rittmannite
(Mn
2+
 
,Ca)Mn
2+
 
(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.64Zanazziite
Ca
 
2
(Mg,Fe)(Mg,Fe,Al)
 
4
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
19.12.65Samuelsonite
(Ca,Ba)Ca
 
8
Fe
2+
2
Mn
2+
2
Al
 
2
[(OH)
 
2
|(PO
 
4
)
 
10
]

Other Names for Dickinsonite-(KMnNa)

Synonyms:
DickinsoniteIMA2005-048
German names:
Dickinsonit
Russian names:
Диккинсонит-(KMnNa)
Spanish names:
Dickinsonita

Other Information

Other Information:Soluble in acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Dickinsonite-(KMnNa)

Reference List:Brush and Dana (1878) American Journal of Science: 16: 114 (as Dickinsonite).

Brush and Dana (1890) American Journal of Science: 39: 213.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 68.

Berman and Gonyer (1930) American Mineralogist: 15: 375.

Wolfe (1941) American Mineralogist: 26: 339.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 717-719 (as Dickinsonite).

American Mineralogist (1981): 66: 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.

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    Localities for Dickinsonite-(KMnNa)

    Hide Locality List
    The 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.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • South Australia
      • Olary Province
        • Kalabity homestead area
    		Record of Sth.Aust. mines summary Olary SI5402 card 235
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Plzeň Region
        • Domažlice (Taus)
          • Otov
    		Masau, M., Staněk, J., Černý, P., Chapman, R. (2000). Metasomatic wolfeite and associated phosphates from the Otov I granitic pegmatite, western Bohemia. J. Czech Geol. Soc. 45, 159-173.
    Namibia
     
    • Erongo Region
      • Karibib District
        • Okongava-Ost farm
    		P. Keller et al., NJMA 183, 197-201 (2007)
    USA
     
    • Arizona
      • Yavapai Co.
    		AmMin 67: 97-113 (1982)
    • Connecticut
      • Fairfield Co.
        • Branchville
    		American Mineralogist (1946): 31: 329-345; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 671, 718, 855.
    Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State, p.278
      • Middlesex Co.
        • Portland
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 702, 718; Januzzi, 1976. Mineral Localities of Connecticut and Southeastern New York State (Taylor Assoc./Mineralogical Press)
    • Maine
      • Androscoggin Co.
        • Auburn
          • Mt. Apatite District
    		No reference listed
    No reference listed
    No reference listed
    "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998
    No reference listed
        • Poland
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 718.
      • Oxford Co.
        • Greenwood
    		No reference listed
    "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998
        • Newry
    		King, V. T., 2006, Minerals of Halls Ridge and Plumbago-Puzzle Mountain, Newry, ... Maine, Mineral News, v. 22(6): p. 1-3.
    • New Hampshire
      • Cheshire Co.
        • Alstead
    		No reference listed
      • Grafton Co.
        • Alexandria
    		No reference listed
        • Groton
    		No reference listed
    Morrill, 1960. NH Mines and Minerals Localities, 2nd ed.
      • Sullivan Co.
        • Newport
    		No reference listed
    • North Carolina
      • Gaston Co.
        • Bessemer City
    		No reference listed
    • South Dakota
      • Pennington Co.
        • Keystone District
          • Keystone
    		Seaman, 1976. Pegmatite Minerals of the World
    Mineral and/or Locality
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