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Triploidite

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Formula:
(Mn2+,Fe2+)2(PO4)(OH)
System:
Monoclinic
Colour:
Red-brown, light pink, ...
Hardness:
4½ - 5
Member of:
Name:
Named in 1878 by George Jarvis Brush and Edward Salisbury Dana from TRIPLite and the Greek "eidos", like, alluding to its resemblance to triplite in habit and chemical composition.
Isostructural with:

Classification of Triploidite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
8.BB.15

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
41.6.3.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq
19.12.13

19 : Phosphates
12 : Phosphates of Mn
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Type Occurrence of Triploidite

Year of Discovery:
1878
Geological Setting of Type Material:
Granitic pegmatite

Occurrences of Triploidite

Geological Setting:
Granitic pegmatites.

Physical Properties of Triploidite

Sub-Adamantine, Sub-Vitreous, Resinous, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Red-brown, light pink, yellow-brown; light pink to light brown in transmitted light.
Streak:
White, off-white.
Hardness (Mohs):
4½ - 5
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {010}, good; on {120}, fair; on {110}, very poor.
Fracture:
Irregular/Uneven
Density:
3.70 g/cm3 (Measured)    3.80 g/cm3 (Calculated)
Comment:
3.66 - estimated value for pure Mn2+ end-member material.

Crystallography of Triploidite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Cell Parameters:
a = 12.366Å, b = 13.276Å, c = 9.943Å
β = 108.23°
Ratio:
a:b:c = 0.931 : 1 : 0.749
Unit Cell Volume:
V 1,550.42 ų (Calculated from Unit Cell)
Morphology:
Crystals rarely observed, prismatic [001], with the prism zone striated vertically. Parallel-fibrous to columnar aggregates common; also divergent or randomly oriented; fibrous; granular.
Comment:
P21/a
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.41 (50)
3.19 (80)
3.10 (90)
2.94 (100)
2.58 (50)
2.31 (50)
1.80 (60)
Comments:
Branchville, Connecticut, USA

Optical Data of Triploidite

Type:
Biaxial (+)
RI values:
nα = 1.709 - 1.735 nβ = 1.710 - 1.736 nγ = 1.714 - 1.740
Birefringence:
0.005
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v weak
Pleochroism:
Weak
Comments:
Pleochroism faint in thick grains with absorption Z > X, Y.
Comments:
2V moderate.

Chemical Properties of Triploidite

Formula:
(Mn2+,Fe2+)2(PO4)(OH)
Essential elements:
All elements listed in formula:

Relationship of Triploidite to other Species

Series:
Forms a series with Wolfeite (see here)
Member of:
Other Members of Group:
Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
Zwieselite(Fe2+,Mn2+)2(PO4)F
8.BB.05AmblygoniteLiAl(PO4)F
8.BB.05MontebrasiteLiAl(PO4)(OH)
8.BB.05TavoriteLiFe3+(PO4)(OH)
8.BB.10Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
8.BB.10Zwieselite(Fe2+,Mn2+)2(PO4)F
8.BB.15SarkiniteMn22+(AsO4)(OH)
8.BB.15Wagnerite(Mg,Fe2+)2(PO4)F
8.BB.15Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
8.BB.15Stanĕkite(Mn2+,Fe2+,Mg)Fe3+(PO4)O
8.BB.15JoosteiteMn2+(Mn3+,Fe3+)(PO4)O
8.BB.15HydroxylwagneriteMg2(PO4)(OH)
8.BB.20HoltedahliteMg2(PO4)(OH)
8.BB.20Satterlyite(Fe2+,Mg,Fe3+)2(PO4)(OH,O)
8.BB.25AlthausiteMg4(PO4)2(OH,O)(F,☐)
8.BB.30AdamiteZn2(AsO4)(OH)
8.BB.30EveiteMn22+(AsO4)(OH)
8.BB.30LibetheniteCu2(PO4)(OH)
8.BB.30OliveniteCu2(AsO4)(OH)
8.BB.30ZincolibetheniteCuZn(PO4)(OH)
8.BB.30ZincoliveniteCuZn(AsO4)(OH)
8.BB.30AuriacusiteFe3+Cu2+(AsO4)O
8.BB.35ParadamiteZn2(AsO4)(OH)
8.BB.35TarbuttiteZn2(PO4)(OH)
8.BB.40BarbosaliteFe2+Fe23+(PO4)2(OH)2
8.BB.40HentscheliteCuFe23+(PO4)2(OH)2
8.BB.40Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
8.BB.40ScorzaliteFe2+Al2(PO4)2(OH)2
8.BB.40WilhelmkleiniteZnFe23+(AsO4)2(OH)2
8.BB.45TrolleiteAl4(PO4)3(OH)3
8.BB.50NamibiteCu(BiO)2(VO4)(OH)
8.BB.55PhosphoellenbergeriteMg14(PO4)6(HPO4,CO3)2(OH)6
8.BB.60UrusoviteCuAl(AsO4)O
8.BB.65TheoparacelsiteCu3(As2O7)(OH)2
8.BB.70TuraniteCu5(VO4)2(OH)4
8.BB.75StoiberiteCu5(VO4)2O2
8.BB.80FingeriteCu11(VO4)6O2
8.BB.85AverieviteCu6(VO4)2O2Cl2
8.BB.90LipscombiteFe2+Fe23+(PO4)2(OH)2
8.BB.90RichelliteCaFe23+(PO4)2(OH,F)2
8.BB.90ZinclipscombiteZnFe23+(PO4)2(OH)2
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)
19.12.14LipscombiteFe2+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
19.12.20Reddingite(Mn2+,Fe2+)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 Triploidite

Name in Other Languages:

Other Information

Not fluorescent in UV
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 Triploidite

Reference List:
Brush and Dana (1878) American Journal of Science: 16: 42, 115, 398.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 779.

Kovář and Slavík (1900) Verh. Geol. Reichsanst. Wien: 50: 347 (Herles analysis).

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 145.

Müllbauer (1925) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 61: 318.

Hägele (1938) Zentralblatt Mineralien: 267.

Kokkoros (1938) Zentralblatt Mineralien: 278.

Richmond (1940) American Mineralogist: 25: 469.

Frondel, C. (1949) American Mineralogist: 34: 692-698.

Zeitschrift für Kristallographie (1970): 131: 1-20.

Internet Links for Triploidite

Localities for Triploidite

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.
Australia
 
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
Pring, A., Francis, G. & Birch, W. D. (1992): Nissonite, namibite, and other additions to the mineral suite from Iron Monarch, South Australia. Australian Mineral. 6, 31-39; www.crocoite.com (Steve Sorrell) and refs therein
    • Olary Province
      • Boolcoomatta Reserve (Boolcoomata Station; Boolcoomatta)
Brazil
 
  • Rio Grande do Norte
    • Borborema mineral province
      • Parelhas
[MinRec 29:196]
Canada
 
  • Manitoba
    • Cross Lake
      • North Group
        • (Gottcha Claim)
The Canadian Mineralogist Vol. 36,pp. 367-376 (1998)
  • Northwest Territories
    • Tungsten
The Canadian Mineralogist Vol. 41, pp. 139-160 (2003)
  • Nova Scotia
    • Lunenburg Co.
      • New Ross
Grantham, R.G. (1985) "Index of the Nova Scotia Museum Mineral Collection", Curatorial Report Number 51.
China
 
  • Guangxi Zhuang Autonomous Region
    • Hechi Prefecture
      • Nandan Co.
http://www.geo.arizona.edu/xtal/group/pdf/GG42_183.pdf
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Kutná Hora (Kuttenberg)
Povondra, P., Pivec, E. (eds.) et al.: Přibyslavice peraluminuous granite. Acta universitatis carolinae, Geologica, 1987, no. 3, s . 183 – 283.
    • Plzeň Region
      • Domažlice (Taus)
Weber, A.: Fosfáty z pegmatitů jz. Čech. Rozpravy II. třídy České akademie, 1948, roč. 58, č. 1.
Finland
 
  • Western and Inner Finland Region
    • Alavus
H-J Wilke (1976) Mineralfundstellen, Band 4, Skandinavien; Haapala, I. (1966): On the granitic pegmatites in the Peräseinäjoki-Alavus area, South Pohjanmaa, Finland. Bulletin de la Commission Geologique de Finlande. 224.
Germany
 
  • Bavaria
    • Upper Palatinate
      • Pleystein
DILL, H.G., MELCHER, F., GERDES, A. and WEBER, B. (2008): The origin and zoning of hypogene and supergene Fe-Mn-Mg-Sc-U-REE-Zn phosphate mineralization from the newly discovered Trutzhofmühle aplite (Hagendorf pegmatite province, Germany). Canadian Mineralogist 46, 1131-1157.
      • Waidhaus
Wittern: "Mineralfundorte in Deutschland", 2001
Japan
 
  • Honshu Island
    • Kanto Region
      • Ibaraki Prefecture
        • Kasumigaura City
          • Chiyoda-machi
Matsubara, S. & Kato, A. (1980) Koubutsugaku Zasshi, 14, 269-286.
Russia
 
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
P.M. Kartashov data
  • Far-Eastern Region
    • Primorskiy Kray
Gonevchuk, V. G., Korostelev, P. G., & Semenyak, B. I. (2005). Genesis of the Tigrinoe tin deposit (Russia). Geology Of Ore Deposits C/C Of Geologiia Rudnykh Mestorozhdenii, 47(3), 223.
South Africa
 
  • Northern Cape Province
    • Namakwa District (Namaqualand)
      • Steinkopf
Minerals of South Africa
Sweden
 
  • Östergötland
    • Motala
      • Godegård
UK
 
  • England
    • Cornwall
      • St Just District
        • St Just
          • Botallack
Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.; Peter G. Embrey (1978) Fourth Supplementary List of British Minerals. Mineralogical Magazine 42:169-177
USA
 
  • Arizona
    • Yavapai Co.
AmMin 67: 97-113 (1982)
        • Independence Gulch
Am Min 67:97-113
  • 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: 671, 855, 938.; Rocks & Minerals (1995) 70:396-409
  • Maine
    • Oxford Co.
      • Newry
King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2.
      • Rumford
Scott Soucey and Tim Blake specimens
  • New Hampshire
    • Cheshire Co.
      • Walpole
Anna Wilken collection
    • Grafton Co.
      • Groton
Whitmore & Lawrence, 2004. The Pegmatite Mines Known As Palermo, p.95.; USGS Prof Paper 353
    • Rockingham Co.
      • Raymond
Harvard Mineralogical Museum no. 125568; Francis, C. A. (1985): Minerals of the Chandler Mine, A Zoned Lithium Rich Pegmatite (Rocks and Minerals, 60:263-264) ; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
  • North Carolina
    • Cleveland Co.
      • Kings Mountain District
Rocks and Minerals, (1985) 60:76-82
  • South Dakota
    • Custer Co.
      • Custer District
        • Berne
R&M 75:3 pp 156-169
        • Fourmile
W.C. van Laer, 2008
    • Pennington Co.
      • Keystone District
        • Keystone
R&M 75:3 pp 156-169; USGS Prof Paper 297A
Mineral and/or Locality  
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