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Welinite

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Formula:
Mn62+(W6+,Mg)2(SiO4)2(O,OH)6
System:
Trigonal
Colour:
orange-red, deep red ...
Hardness:
4
Name:
Named after Eric Welin (b. 1923), mineralogist and geochronologist, Swedish Museum of Natural History, Stockholm, Sweden
This page provides mineralogical data about Welinite.

Classification of Welinite

Approved 1966
9.AF.75

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
52.4.1.2

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
17.10.30

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
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http://www.mindat.org/min-4264.html
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Type Occurrence of Welinite

Year of Discovery:
1966

Physical Properties of Welinite

Resinous
Colour:
orange-red, deep red brown to reddish black
Streak:
pale reddish brown
Hardness (Mohs):
4
Cleavage:
Distinct/Good

Crystallography of Welinite

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 8.15Å, c = 4.78Å
Ratio:
a:c = 1 : 0.587
Unit Cell Volume:
V 274.96 ų (Calculated from Unit Cell)
Comment:
Originally assumed to be P63.

Optical Data of Welinite

Type:
Uniaxial (+)
RI values:
nω = 1.864 nε = 1.880
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Welinite

Formula:
Mn62+(W6+,Mg)2(SiO4)2(O,OH)6
Essential elements:
All elements listed in formula:
Common Impurities:
Fe,Sb,H2O

Relationship of Welinite to other Species

9.AF.05SillimaniteAl2(SiO4)O
9.AF.10AndalusiteAl2(SiO4)O
9.AF.10KanonaiteMn3+Al(SiO4)O
9.AF.15KyaniteAl2(SiO4)O
9.AF.20MulliteAl4+2xSi2-2xO10-x
9.AF.20Krieselite(Al,Ga)2(GeO4)(OH)2
9.AF.23BoromulliteAl9BSi2O19
9.AF.25YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)
9.AF.30MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
9.AF.30StauroliteFe22+Al9Si4O23(OH)
9.AF.30ZincostauroliteZn2Al9Si4O23(OH)
9.AF.35TopazAl2(SiO4)(F,OH)2
9.AF.40NorbergiteMg3(SiO4)(F,OH)2
9.AF.45AlleghanyiteMn52+(SiO4)2(OH)2
9.AF.45Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
9.AF.45ReinhardbraunsiteCa5(SiO4)2(OH,F)2
9.AF.45KumtyubeiteCa5(SiO4)2F2
9.AF.45HydroxylchondroditeMg5(SiO4)2(OH)2
9.AF.50Humite(Mg,Fe2+)7(SiO4)3(F,OH)2
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2
9.AF.55ClinohumiteMg9(SiO4)4F2
9.AF.55SonoliteMn92+(SiO4)4(OH,F)2
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2
9.AF.60LeucophoeniciteMn72+(SiO4)3(OH)2
9.AF.65Ribbeite(Mn2+,Mg)5(SiO4)2(OH)2
9.AF.70JerrygibbsiteMn92+(SiO4)4(OH)2
9.AF.75FranciscaniteMn62+(V5+,☐)2(SiO4)2(O,OH)6
9.AF.75ÖrebroiteMn32+(Sb5+,Fe3+)(SiO4)(O,OH)3
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
9.AF.85Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
9.AF.85MagnesiochloritoidMgAl2(SiO4)O(OH)2
9.AF.85Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
9.AF.90PoldervaartiteCaCa[SiO3(OH)](OH)
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)
17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2O
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2O
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2O
17.10.4Haüyne(Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2
17.10.5Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4
17.10.6Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O
17.10.8MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2
17.10.9Delhayelite(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2O
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2O
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
17.10.12Afghanite(Na,Ca,K)8(Al6Si6O24)(Cl2,SO4,CO3)3 · 0.5H2O
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2O
17.10.14Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2
17.10.15Sacrofanite(Na,K)98Ca20(Al6Si6O24)14(SO4)26Cl2 · 8H2O
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
17.10.19Ellestadite
17.10.20Ellestadite-(Cl)Ca10(SiO4)3(SO4)3Cl2
17.10.21HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)
17.10.22FluorellestaditeCa5(SiO4)1.5(SO4)1.5F
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)
17.10.25RoeblingitePb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)
17.10.27KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
17.10.29MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2

Other Names for Welinite

Name in Other Languages:
German:Welinit
Spanish:Welinita

Other Information

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 Welinite

Reference List:
Arkiv för Mineralogi och Geologi (1967): 4: 407-411.

American Mineralogist (1968): 53: 1064.

American Mineralogist (1986): 71: 1522-1526.

Internet Links for Welinite

Localities for Welinite

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.
France
 
  • Languedoc-Roussillon
    • Lozère
      • La Canourgue
        • Auxillac
BRGM (1981) - Fiche BSS 08625X4003/GT
  • Midi-Pyrénées
    • Hautes-Pyrénées
Le Règne Minéral 47: 5-21
        • Nabias
        • Vielle Aure
DE ASCENCAO GUEDES R., TIXADOR Y., CASTERET A. & GOUJOU JC. (2002) La mine de Coustou, Vielle-Aure, Hautes-Pyrénées. Le Règne Minéral, 47, 23-31. (in french)
Japan
 
  • Kyushu Region
    • Kumamoto Prefecture
      • Itsuki
Mem. Fac. Sci., Ehime University, 6 (2000), 1-7.
Sweden (TL)
 
  • Värmland
    • Filipstad
Arkiv Min.Geol.(1967) 4, 407-411; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
  • Västmanland
    • Hällefors
      • Grythyttan
Holtstam, D. (2001): W and V mineralization in Långban-type Fe-Mn deposits: Epigenetic or Syngenetic? Geologiske Föreningen i Stockholm Förhandlingar 123: 29-33; Moore, P. B. (1967). Welinite, a new mineral from LAngban. Arkiv fOr Mineralogi och Geologi, 4, 407-411.
Mineral and/or Locality  
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