Welinite
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Formula:
Mn2+6(W6+,Mg)2(SiO4)2(O,OH)6
Colour:
orange-red, deep red brown to reddish black
Lustre:
Resinous
Hardness:
4
Crystal System:
Trigonal
Member of:
Name:
Named after Eric Welin (b. 1923), mineralogist and geochronologist, Swedish Museum of Natural History, Stockholm, Sweden
Type Locality:
This page provides mineralogical data about Welinite.
Classification of Welinite
Approved
Approval Year:
1966
8/B.09-14
9.AF.75
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
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
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
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
Physical Properties of Welinite
Resinous
Colour:
orange-red, deep red brown to reddish black
Streak:
pale reddish brown
Hardness:
4 on Mohs scale
Cleavage:
Distinct/Good
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.
and does not take into account mineral colouration.
Surface Relief:
Very High
Chemical Properties of Welinite
Formula:
Mn2+6(W6+,Mg)2(SiO4)2(O,OH)6
IMA Formula:
(Mn4+,W)(Mn2+,Mg)(SiO4)(O,OH)3
Common Impurities:
Fe,Sb,H2O
Crystallography of Welinite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 8.15 Å, c = 4.78 Å
Ratio:
a:c = 1 : 0.587
Unit Cell V:
274.96 ų (Calculated from Unit Cell)
Comment:
Originally assumed to be P63.
Type Occurrence of Welinite
Synonyms of Welinite
Other Language Names for Welinite
Relationship of Welinite to other Species
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Nickel-Strunz Grouping
9.AF.05 | Sillimanite | Al2(SiO4)O | Orth. mmm (2/m 2/m 2/m) |
9.AF.10 | Andalusite | Al2(SiO4)O | Orth. mmm (2/m 2/m 2/m) : Pnnm |
9.AF.10 | Kanonaite | Mn3+Al(SiO4)O | Orth. mmm (2/m 2/m 2/m) : Pnnm |
9.AF.15 | Kyanite | Al2(SiO4)O | Tric. 1 : P1 |
9.AF.20 | Mullite | Al4+2xSi2-2xO10-x | Orth. mmm (2/m 2/m 2/m) : Pbam |
9.AF.20 | Krieselite | (Al,Ga)2(GeO4)(OH)2 | Orth. mmm (2/m 2/m 2/m) : Pnma |
9.AF.23 | Boromullite | Al9BSi2O19 | Orth. mm2 : Cmc21 |
9.AF.25 | Yoderite | Mg(Al,Fe3+)3(SiO4)2O(OH) | Mon. 2/m : P21/m |
9.AF.30 | Magnesiostaurolite | Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4 | Mon. 2/m : B2/m |
9.AF.30 | Staurolite | Fe2+2Al9Si4O23(OH) | Mon. 2/m : B2/m |
9.AF.30 | Zincostaurolite | Zn2Al9Si4O23(OH) | Mon. 2/m : B2/m |
9.AF.35 | Topaz | Al2(SiO4)(F,OH)2 | Orth. mmm (2/m 2/m 2/m) |
9.AF.40 | Norbergite | Mg3(SiO4)(F,OH)2 | Orth. mmm (2/m 2/m 2/m) |
9.AF.45 | Alleghanyite | Mn2+5(SiO4)2(OH)2 | Mon. 2/m : P21/b |
9.AF.45 | Chondrodite | (Mg,Fe2+)5(SiO4)2(F,OH)2 | Mon. 2/m : P21/b |
9.AF.45 | Reinhardbraunsite | Ca5(SiO4)2(OH,F)2 | Mon. 2/m : P21/b |
9.AF.45 | Kumtyubeite | Ca5(SiO4)2F2 | Mon. 2/m : P21/b |
9.AF.45 | Hydroxylchondrodite | Mg5(SiO4)2(OH)2 | Mon. 2/m : P21/b |
9.AF.50 | Humite | (Mg,Fe2+)7(SiO4)3(F,OH)2 | Orth. mmm (2/m 2/m 2/m) |
9.AF.50 | Manganhumite | (Mn2+,Mg)7(SiO4)3(OH)2 | Orth. |
9.AF.50 | Unnamed (Ca-analogue of Humite) | Ca7(SiO4)4F2 | Orth. mmm (2/m 2/m 2/m) |
9.AF.55 | Clinohumite | Mg9(SiO4)4F2 | Mon. 2/m : P21/b |
9.AF.55 | Sonolite | Mn2+9(SiO4)4(OH)2 | Mon. |
9.AF.55 | Hydroxylclinohumite | Mg9(SiO4)4(OH)2 | Mon. 2/m |
9.AF.60 | Leucophoenicite | Mn2+7(SiO4)3(OH)2 | Mon. 2/m : P21/b |
9.AF.65 | Ribbeite | (Mn2+,Mg)5(SiO4)2(OH)2 | Orth. |
9.AF.70 | Jerrygibbsite | Mn2+9(SiO4)4(OH)2 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
9.AF.75 | Franciscanite | Mn2+6(V5+,☐)2(SiO4)2(O,OH)6 | Hex. |
9.AF.75 | Örebroite | Mn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3 | Hex. |
9.AF.80 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 | Hex. |
9.AF.85 | Chloritoid | (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2 | Mon. 2/m : B2/b |
9.AF.85 | Magnesiochloritoid | MgAl2(SiO4)O(OH)2 | Mon. 2/m : B2/b |
9.AF.85 | Ottrélite | (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2 | Mon. |
9.AF.90 | Poldervaartite | CaCa[SiO3(OH)](OH) | Orth. mmm (2/m 2/m 2/m) : Pbca |
9.AF.90 | Olmiite | CaMn2+[SiO3(OH)](OH) | Orth. mmm (2/m 2/m 2/m) : Pbca |
Related Minerals - Dana Grouping (8th Ed.)
52.4.1.1 | Örebroite | Mn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3 | Hex. |
52.4.1.3 | Kittatinnyite | Ca2Mn2Mn(SiO4)2(OH)4 · 9H2O | Hex. |
52.4.1.4 | Franciscanite | Mn2+6(V5+,☐)2(SiO4)2(O,OH)6 | Hex. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
17.10.1 | Nosean | Na8(Al6Si6O24)(SO4) · H2O | Iso. 4 3m : P4 3n |
17.10.2 | Pitiglianoite | Na6K2(Al6Si6O24)(SO4) · 2H2O | Hex. |
17.10.3 | Vishnevite | (Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2O | Hex. 6 : P63 |
17.10.4 | Haüyne | (Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl) | Iso. 4 3m : P4 3n |
17.10.5 | Liottite | (Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4 | Hex. |
17.10.6 | Latiumite | (Ca,K)4(Si,Al)5O11(SO4,CO3) | Mon. |
17.10.7 | Tuscanite | (K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O | Mon. |
17.10.8 | Microsommite | Na4K2Ca2(Al6Si6O24)(SO4)Cl2 | Hex. |
17.10.9 | Delhayelite | (Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2O | Orth. |
17.10.10 | Hydrodelhayelite | KCa2AlSi7O17(OH)2 · 6H2O | Orth. |
17.10.11 | Davyne | (Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2 | Hex. 6/m : P63/m |
17.10.12 | Afghanite | (Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6 | Trig. 3m : P3 1c |
17.10.13 | Franzinite | (Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2O | Hex. |
17.10.14 | Giuseppettite | (Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2 | Hex. |
17.10.15 | Sacrofanite | (Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2O | Hex. |
17.10.16 | Chessexite | (Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O | Orth. |
17.10.17 | Innelite | Na2CaBa4Ti3(Si2O7)2(SO4)2O4 | Tric. 1 : P1 |
17.10.18 | Thaumasite | Ca3(SO4)[Si(OH)6](CO3) · 12H2O | Hex. 6 : P63 |
17.10.19 | Ellestadite | ||
17.10.20 | Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl | Hex. 6/m : P63/m |
17.10.21 | Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
17.10.22 | Fluorellestadite | Ca5(SiO4)1.5(SO4)1.5F | Hex. |
17.10.23 | Mattheddleite | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) | Hex. 6/m : P63/m |
17.10.24 | Queitite | Pb4Zn2(SO4)(SiO4)(Si2O7) | Mon. 2 : P21 |
17.10.25 | Roeblingite | Pb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O | Mon. 2/m : B2/m |
17.10.26 | Yoshimuraite | Ba2Mn2Ti(Si2O7)(PO4)O(OH) | Tric. 1 : P1 |
17.10.27 | Kegelite | Pb8Al4(Si8O20)(SO4)2(CO3)4(OH)8 | Mon. |
17.10.28 | Wenkite | (Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O | Hex. |
17.10.29 | Macquartite | Cu2Pb7(CrO4)4(SiO4)2(OH)2 | Mon. |
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Arkiv för Mineralogi och Geologi (1967): 4: 407-411.
American Mineralogist (1968): 53: 1064.
American Mineralogist (1986): 71: 1522-1526.
Internet Links for Welinite
mindat.org URL:
https://www.mindat.org/min-4264.html
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Localities for Welinite
Locality List




All localities listed without proper references should be considered as questionable.
France | |
| Le Règne Minéral 47: 5-21 |
| |
| Ragu, A. (1994): Helvite from the French Pyrénées as evidence for granite-related hydrothermal activity. Canadian Mineralogist 32, 111-120.; 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) |
| BRGM (1981) - Fiche BSS 08625X4003/GT |
Japan | |
| Mem. Fac. Sci., Ehime University, 6 (2000), 1-7. |
Sweden (TL) | |
| 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. |
| 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. |
Långban, Filipstad, Värmland, Sweden