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Tuperssuatsiaite

A valid IMA mineral species
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Fe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2O
The IMA formula (see below) is not a charge-balanced end-member formula. The mindat formula (above) is charge-balanced and is derived from the proposed site occupancies listed in Table 11 of Leung & McDonald (2020). Note that in natural material, some Mn2+ and possibly Fe2+ partially replaces Fe3+ in both the M1 and M2 cation sites, with charge balance facilitated by increasing Na in the M3 site.
Colour:
Golden-yellow, reddish brown, , brown, dark brown, orange-yellow, green
Lustre:
Silky, Dull
Specific Gravity:
2.465
Crystal System:
Monoclinic
Member of:
Palygorskite Group
Name:
Named after its discovery locality, Tuperssuatsiat Bay, Illimaussaq complex, Narsaq municipality, Greenland.
Type Locality:
ⓘTuperssuatsiat Bay, Tunulliarfik Fjord, Ilímaussaq complex, Kujalleq, Greenland
Palygorskite Group.

At least two visually similar, isomorphous species are known (Cámara et al., 2002). See alsowindhoekite.


Unique Identifiers
IMA Formula:
Na2(Fe3+,Mn2+)3Si8O20(OH)2 · 4H2O
Approval year:
1984
First published:
1984
Type description reference:
Karup-Møller, S., Petersen, O. V. (1984) Tuperssuatsiaite, a new mineral species from the Ilímaussaq intrusion in South Greenland.Neues Jahrbuch für Mineralogie - Monatshefte, 1984. 501-512

Classification of Tuperssuatsiaite

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
Dana 7th ed.:
74.3.1.2
Dana 8th ed.:
74.3.1a.2

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
Hey's CIM Ref.:
14.20.5

14 : Silicates not Containing Aluminum
20 : Silicates of Fe and alkali metals

Mineral Symbols
Transparency:
Transparent
Colour:
Golden-yellow, reddish brown, , brown, dark brown, orange-yellow, green
Comment:
From Aris Quarry, Namibia crystals may be colour zoned. Some green crystals turn brown after collection and this may be due to a coupled dehydration-oxidation mechanism.
Streak:
Brownish yellow
Cleavage:
Distinct/Good
Good on the {100}
Fracture:
Conchoidal
Density:
2.465 g/cm3 (Measured)    2.12 g/cm3 (Calculated)

Optical Data of Tuperssuatsiaite
Surface Relief:
Moderate
Dispersion:
none
Optical Extinction:
X ∧ a = 20°-22° (in the obtuse angle β); Y = b; Z ∧ c = 5°-7°.
Pleochroism:
Weak
Comments:
X = colorless; Y = colorless to light reddish brown; Z = pale yellowish brown to dark reddish brown.

Chemistry of Tuperssuatsiaite
Common Impurities:
K,Mg,Ca,Mn,Zn,Al,Ti,F,Cl

Chemical Analysis
General Appearance of Type Material:
As cavity filling in late veins, forming mm- to cm-sized red-brown fan shaped aggregates or rosettes of fine fibres.
Place of Conservation of Type Material:
Geological Museum, University of Copenhagen, Denmark.
Geological Setting of Type Material:
Alkaline intrusion.
Associated Minerals at Type Locality:
AdulariaAegirineAlbiteNatrolite
Reference:
Karup-Møller, S., Petersen, O. V. (1984) Tuperssuatsiaite, a new mineral species from the Ilímaussaq intrusion in South Greenland.Neues Jahrbuch für Mineralogie - Monatshefte, 1984. 501-512

Synonyms of Tuperssuatsiaite

Other Language Names for Tuperssuatsiaite

Relationship of Tuperssuatsiaite to other Species
Other Members of Palygorskite Group:
IkorskyiteKMn3+(Si4O10) · 3H2OMon. 2/m :P21/b
Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m :B2/m
RaiteMn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6Orth. 222 :C222
Unnamed (Na-Ca-Fe-Silicate-Hydrate)NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2OTric.1 :P1
WindhoekiteFe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2OMon. 2/m :B2/m
Windmountainite◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m :B2/m
YofortieriteMn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m :B2/m

Common AssociatesTric.1 :P19.EE.05BementiteMn7Si6O15(OH)8Mon.9.EE.07InnsbruckiteMn33(Si2O5)14(OH)38Mon.m :Bm9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm :P63mc9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m :B2/m9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m :B2/m9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig.3m(32/m) :P3m19.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig.3m(32/m) :P3m19.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Trig.3m(32/m) :R3m9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m :P3m19.EE.20Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m :B2/m9.EE.20YofortieriteMn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m :B2/m9.EE.20WindhoekiteFe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2OMon. 2/m :B2/m9.EE.20Windmountainite◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m :B2/m9.EE.20IkorskyiteKMn3+(Si4O10) · 3H2OMon. 2/m :P21/b9.EE.20Unnamed (Na-Ca-Fe-Silicate-Hydrate)NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2OTric.1 :P19.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth.mmm(2/m2/m2/m) :Pnna9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth.mmm(2/m2/m2/m)9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric.1 :P19.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric.1 :P19.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric.1 :P19.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig.3 :P39.EE.35KodamaiteNa3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2OTric.1 :P19.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.9.EE.40NatrosiliteNa2Si2O5Mon. 2/m :P21/b9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m :P21/b9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth.mmm(2/m2/m2/m) :Cmcm9.EE.55RaiteMn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6Orth. 222 :C2229.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig. 3m9.EE.65ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig. 3m :P31c9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig.3 :R39.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric.1 :P19.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2OTric.1 :P19.EE.80EllingseniteNa5Ca6Si18O38(OH)13 · 6H2OTric.1 :P19.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2OTric.1 :P1

Fluorescence of Tuperssuatsiaite

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    • References for TuperssuatsiaiteⓘBortolan quarryAtencio et al. (2005)Azzi (2019)+1 other reference
    Canada
     
    HORVÁTH et al. (2000)+1 other referenceHorváth et al. (1998)Horváth et al. (1998)
    Greenland
     
    Petersen (2001)Knut Edvard Larsen collection # 1107 ( Ex Hans Vidar Ellingsen & Astrid Haugen collection)Pekov et al. (2002)Karup-Møller et al. (1984)Karup-Møller et al. (1984)+1 other reference
    Namibia
     
    ...+6 other references
    Russia
     
    ...Arzamastsev et al. (2008)+1 other referencePekov (2000)
    USA
     
    Howard (2007)Jerry Cone Collection
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