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Reddingite

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Formula:
(Mn2+,Fe2+)3(PO4)2 · 3H2O
System:
Orthorhombic
Colour:
Colourless, pale pink or ...
Hardness:
Name:
For the type locality at Branchville, in the town of Redding, Fairfield Co., Connecticut, USA.
Phosphoferrite Group, Phosphoferrite-Reddingite Series.

Note: Some "reddingites" may in fact be correianevesite.

Classification of Reddingite

Approved
8.CC.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
40.3.2.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
19.12.20

19 : Phosphates
12 : Phosphates of Mn
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http://www.mindat.org/min-3378.html
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First Recorded Occurrence of Reddingite

Year of Discovery:
1878

Physical Properties of Reddingite

Vitreous, Resinous
Diaphaneity (Transparency):
Transparent, Translucent
Comment:
Lustre extends to sub-resinous from vitreous.
Colour:
Colourless, pale pink or yellow, reddish brown to dark brown (altered); colourless, faintly tinted pink in transmitted light.
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
On {010}, poor
Fracture:
Irregular/Uneven
Density:
3 - 3.2 g/cm3 (Measured)    3.24 g/cm3 (Calculated)
Comment:
Calculated value is for Mn:Fe = 3:1.

Crystallography of Reddingite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmna
Cell Parameters:
a = 9.49Å, b = 10.08Å, c = 8.7Å
Ratio:
a:b:c = 0.941 : 1 : 0.863
Unit Cell Volume:
V 832.24 ų (Calculated from Unit Cell)
Morphology:
Crystals octahedral with large {111}, or tabular {010}. The crystals are frequently in parallel grouping. Massive, granular; coarsely fibrous.

Crystallographic forms of Reddingite

Crystal Atlas:
Image Loading
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Reddingite no.1 - Goldschmidt (1913-1926)
Reddingite no.2 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Optical Data of Reddingite

Type:
Biaxial (+)
RI values:
nα = 1.643 - 1.658 nβ = 1.648 - 1.664 nγ = 1.674 - 1.685
2V:
Measured: 41° to 65°, Calculated: 48° to 58°
Max Birefringence:
δ = 0.031
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong
Pleochroism:
Visible
Comments:
Buckfield, Maine material:

X = colourless
Y = Pinkish brown
Z = Pale yellow

Chemical Properties of Reddingite

Formula:
(Mn2+,Fe2+)3(PO4)2 · 3H2O
Essential elements:
All elements listed in formula:
Common Impurities:
Fe

Relationship of Reddingite to other Species

Series:
Forms a series with Phosphoferrite (see here)
Other Members of Group:
CorreianevesiteFe2+Mn22+(PO4)2 · 3H2O
Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2O
Kryzhanovskite(Fe3+,Mn2+)3(PO4)2(OH,H2O)3
LandesiteMn2+3-xFex3+(PO4)2(OH)x · (3-x)H2O
Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2O
8.CC.05Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2O
8.CC.05Kryzhanovskite(Fe3+,Mn2+)3(PO4)2(OH,H2O)3
8.CC.05LandesiteMn2+3-xFex3+(PO4)2(OH)x · (3-x)H2O
8.CC.05Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2O
8.CC.10KaatialaiteFe(H2AsO4)3 · 5H2O
8.CC.15LeogangiteCu10(AsO4)4(SO4)(OH)6 · 8H2O
19.12.1MetaswitzeriteMn3(PO4)2 · 4H2O
19.12.2BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
19.12.3NatrophiliteNaMn2+PO4
19.12.4SidorenkiteNa3Mn2+(CO3)(PO4)
19.12.5Niahite(NH4)(Mn2+,Mg)(PO4) · H2O
19.12.6RobertsiteCa3Mn43+(PO4)3O2 · 3H2O
19.12.7PararobertsiteCa2Mn33+(PO4)3O2 · 3H2O
19.12.8SinkankasiteMn2+Al(PO3OH)2(OH) · 6H2O
19.12.9MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2O
19.12.10Heterosite(Fe3+,Mn3+)PO4
19.12.11Purpurite(Mn3+,Fe3+)PO4
19.12.12Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
19.12.13Triploidite(Mn2+,Fe2+)2(PO4)(OH)
19.12.14LipscombiteFe2+Fe23+(PO4)2(OH)2
19.12.15FrondeliteMn2+Fe43+(PO4)3(OH)5
19.12.16RockbridgeiteFe2+Fe43+(PO4)3(OH)5
19.12.17Kryzhanovskite(Fe3+,Mn2+)3(PO4)2(OH,H2O)3
19.12.18LandesiteMn2+3-xFex3+(PO4)2(OH)x · (3-x)H2O
19.12.19Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2O
19.12.21EarlshannoniteMn2+Fe23+(PO4)2(OH)2 · 4H2O
19.12.22Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
19.12.23Switzerite(Mn,Fe)3(PO4)2 · 7H2O
19.12.24LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
19.12.25PseudolaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
19.12.26StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
19.12.27StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
19.12.28Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
19.12.29Ferroalluaudite(Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3
19.12.30Fillowite{Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36
19.12.31JohnsomervilleiteNa10Ca6Mg18Fe25(PO4)36
19.12.32WicksiteNaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2O
19.12.33Dickinsonite-(KMnNa){KNa}{Mn2+◻}{Ca}{Na3}{Mn132+}{Al}(PO4)12(OH)2
19.12.34Sarcopside(Fe2+,Mn2+,Mg)3(PO4)2
19.12.35Ludlamite(Fe,Mn,Mg)3(PO4)2 · 4H2O
19.12.36Graftonite(Fe2+,Mn2+,Ca)3(PO4)2
19.12.37WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2O
19.12.38FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
19.12.39Beusite(Mn2+,Fe2+,Ca,Mg)3(PO4)2
19.12.40MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
19.12.41Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
19.12.42Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn22+}{Fe23+}(PO4)4(OH)2 · 8H2O
19.12.43Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
19.12.44KeckiteCaMn2+Fe23+Fe23+(PO4)4(OH)3(H2O)7
19.12.45StanfielditeCa7Ca2Mg9(PO4)12
19.12.46Laubmannite(Fe2+,Mn2+,Ca)3Fe63+(PO4)4(OH)12
19.12.47ZodaciteCa4Mn2+Fe43+(PO4)6(OH)4 · 12H2O
19.12.48HagendorfiteNaCaMn2+Fe22+(PO4)3
19.12.49Maghagendorfite(□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3
19.12.50VaruliteNaCaMn2+Mn22+(PO4)3
19.12.51GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8
19.12.52Attakolite(Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4
19.12.53Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
19.12.54Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O
19.12.55Eosphorite(Mn2+,Fe2+)Al(PO4)(OH)2 · H2O
19.12.56Ernstite(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O
19.12.57Childrenite(Fe2+,Mn2+)Al(PO4)(OH)2 · H2O
19.12.58BobfergusoniteNa2Mn5FeAl(PO4)6
19.12.59QingheiiteNaMn3+Mg(Al,Fe3+)(PO4)3
19.12.60Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O
19.12.61Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O
19.12.62Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O
19.12.63Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O
19.12.64ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
19.12.65Samuelsonite(Ca,Ba)Ca8Fe22+Mn22+Al2(PO4)10(OH)2

Other Names for Reddingite

Name in Other Languages:
German:Reddingit
Spanish:Reddingita

Other Information

Other Information:
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.

References for Reddingite

Reference List:
Brush and Dana (1878) American Journal of Science: 16: 120.

Brush and Dana (1879) American Journal of Science: 17: 365.

Brush and Dana (1890) American Journal of Science: 39: 211.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 126.

Landes (1925) American Mineralogist: 10: 387.

Berman and Gonyer (1930) American Mineralogist: 15: 379.

Wolfe (1940) American Mineralogist: 25: 752.

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. 727-729.

Inorganic Chemistry: 15: 316-321.

Mineralogical Magazine (1980): 43: 789.

Ray L. Frost, Yunfei Xi, Ricardo Scholz, Fernanda M. Belotti, Leonardo E. Lagoeiro (2012): Chemistry, Raman and infrared spectroscopic characterization of the phosphate mineral reddingite: (MnFe)3(PO4)2(H2O,OH)3, a mineral found in lithium-bearing pegmatite. Physics and Chemistry of Minerals 39, 803-810.

Internet Links for Reddingite

Localities for Reddingite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Argentina
 
  • San Luis
    • Coronel Pringles Department
      • Totoral pegmatitic field
OYARZABAL, J. and GALLISKI, M.A.. Hureaulite, Mn+25(H2O)4[PO3(OH)]2[PO4]2, from different deposits of the Totoral pegmatitic field, San Luis. Rev. Asoc. Geol. Argent. [online]. 2007, vol.62, n.2, pp. 210-216.
Brazil
 
  • Minas Gerais
    • Doce valley
      • Água Boa
Peter Kohorst collection
      • Conselheiro Pena
Ray L. Frost, Yunfei Xi, Ricardo Scholz, Fernanda M. Belotti, Leonardo E. Lagoeiro (2012): Chemistry, Raman and infrared spectroscopic characterization of the phosphate mineral reddingite: (MnFe)3(PO4)2(H2O,OH)3, a mineral found in lithium-bearing pegmatite. Physics and Chemistry of Minerals 39, 803-810.; Jordi Fabre
      • Divino das Laranjeiras
Mike Scott S104310 from Cureton #HC from Carlos Barbosa
      • Galiléia
        • Sapucaia do Norte
AmMin 89:1087
China
 
  • Guizhou Province
    • Tongren Prefecture
      • Songtao Co.
        • Songtao Mn ore field
Qi Zhou, Yuansheng Du, and Ying Qin (2013): Mineral Deposits 32(3), 457-466
Finland
 
  • Western and Inner Finland Region
    • Orivesi
      • Eräjärvi area
Sandström, F. & Lahti, S.I. (2009): Viitaniemipegmatiten i Eräjärvi, Orivesi, Finland. Litiofilen 26 (1): 11-38
Germany
 
  • Bavaria
    • Upper Palatinate
      • Plößberg
Weiss: "Mineralfundstellen, Deutschland West", 1990
      • Waidhaus
        • Hagendorf
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
http://www.berthold-weber.de/h_miner.htm
Japan
 
  • Honshu Island
    • Kanto Region
      • Ibaraki Prefecture
        • Kasumigaura City
          • Chiyoda-machi
Matsubara & Kato (1980) Koubutsugaku Zasshi, 14, 269-286.
Portugal
 
  • Guarda District
    • Sabugal
      • Bendada
Schnorrer-Köhler (1991), Mineral Occurrences.
Pedro Alves collection
  • Viana do Castelo District
    • Viana do Castelo
BELLO, A. d'O. (1909-1913) Mineraux portugais. Bull. Soc. Portugaise Sci. Nat., 2, 272-280; 4, 68-78; 6, 90-103; Mineral samples in the Collection of the IST (Instituto Superior Técnico); Pedro Alves, collection and in situ observations.
  • Viseu District
    • Mangualde
      • Cubos-Mesquitela-Mangualde area
Mineralien Atlas
USA
 
  • Connecticut
    • Fairfield Co.
      • Redding (Reading)
        • Branchville
Brush and Dana (1878); Shainin (1946): American Mineralogist 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: 702, 729.; Rocks & Minerals (1995) 70:396-409
    • Middlesex Co.
      • Portland
        • Collins Hill
          • Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries)
Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
  • Maine
    • Androscoggin Co.
      • Poland
King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates. 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: 721, 729.
    • Oxford Co.
      • Buckfield
Landes (1925) Paragenesis of the Granite Pegmatites of Central Maine, American Mineralogist.
      • Greenwood
        • Uncle Tom Mountain
No reference listed
      • Newry
King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2.
      • Rumford
King, V.T., 1994, Mineralogy of Maine, Descriptive Mineralogy, v.1.
  • New Hampshire
    • Grafton Co.
      • Grafton
Morrill, P, 1960, New Hampshire Mines and Mineral Localities.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
      • Groton
Morrill, 1960. NH Mines and Minerals Localities, 2nd ed.
    • Strafford Co.
      • Strafford
        • Parker Mountain
Rocks & Min. 80:256 (2005); Rocks & Minerals 80:4 pp234-241
  • South Dakota
    • Custer Co.
      • Custer District
        • Custer
Januzzi, R.E. and Seaman, David M. (1976) Mineral Localities Of Connecticut and Southern New York State and Pegmatite Minerals of the World.
    • Pennington Co.
      • Keystone District
        • Glendale
Rocks & Minerals: 75(3): 156-169.
Mineral and/or Locality  
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