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Erssonite

A valid IMA mineral species
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00781870017361055679464.jpg
Erssonite

LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
00621520017272011009894.jpg
Erssonite, etc.

LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
02750400017272473373535.jpg
Erssonite

LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
00621520017272011009894.jpg
Erssonite, etc.

LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
02750400017272473373535.jpg
Erssonite

LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
00621520017272011009894.jpg
Erssonite, etc.

LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
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About ErssoniteHide

Formula:
Mg7Fe3+2(OH)18[Ca(H2O)6](SO4)2 · 12H2O
Colour:
Colourless
Lustre:
Vitreous
Specific Gravity:
2.02 (Calculated)
Crystal System:
Trigonal
Name:
The mineral is named in honour of the Swedish amateur mineralogist Dr. Anders Ersson (b. 1971).
The Fe3+ analogue of wermlandite.

Unique combination of (the species-defining) elements (at the upload time).


Unique IdentifiersHide

Mindat ID:
55457
Long-form identifier:
mindat:1:1:55457:0

Similar NamesHide

IMA Classification of ErssoniteHide

Classification of ErssoniteHide

Strunz-mindat (2026):
7.DF.

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
EsoIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ErssoniteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Tenacity:
Malleable
Cleavage:
Perfect
Mica-like cleavage on {0001}
Density:
2.02 g/cm3 (Calculated)

Chemistry of ErssoniteHide

Mindat Formula:
Mg7Fe3+2(OH)18[Ca(H2O)6](SO4)2 · 12H2O
Element Weights:
Element% weight
O61.513 %
Mg14.866 %
Fe9.759 %
S5.604 %
H4.756 %
Ca3.502 %

Calculated from ideal end-member formula.
O
Mg
Fe
S
H
Ca
Elements listed:
Ca, Fe, H, Mg, O, S - search for minerals with similar chemistry

Chemical AnalysisHide

Oxide wt%:
 1
MgO28.67 %
CaO2.76 %
Al2O30.23 %
Cr2O30.23 %
Fe2O316.00 %
SiO20.48 %
SO314.80 %
H2O35.58 %
Total:98.75 %
Empirical formulas:
Sample IDEmpirical Formula
1H41.48Ca0.52Mg7.47Fe3+2.11Al0.05Cr0.03S1.94Si0.08O38
Sample references:
IDLocalityReferenceNotes
1LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
Zhitova, Elena S., Chukanov, Nikita V., Jonsson, Erik, Pekov, Igor V., Belakovskiy, Dmitry I., Vigasina, Marina F., Zubkova, Natalia V., Van, Konstantin V., Britvin, Sergey N. (2021) Erssonite, CaMg7Fe3+2(OH)18(SO4)2⋅12H2O, a new hydrotalcite-supergroup mineral from LĂ„ngban, Sweden. Mineralogical Magazine, 85 (5) 817-826 doi:10.1180/mgm.2021.70
Electron microprobe (H2O content is calculated from structure data); The empirical formula based on 38 O atoms.

Crystallography of ErssoniteHide

Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
P3c1
Setting:
P3c1
Cell Parameters:
a = 9.3550(5) Å, c = 22.546(1) Å
Ratio:
a:c = 1 : 2.41
Unit Cell V:
1708.8 ų
Z:
2
Morphology:
Platy hexagonal crystals flattened on [0001], aggregates.

X-Ray Powder DiffractionHide

Type Occurrence of ErssoniteHide

Type Locality:
ⓘ LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden
General Appearance of Type Material:
Colourless, platy hexagonal crystals flattened on [0001], up to 0.5 mm across and up to 10 ÎŒm thick, occurring mainly as aggregates in cavities of dolomitic rock.
Place of Conservation of Type Material:
Collections of (1) the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5669/1, and (2) the Swedish Museum of Natural History (Naturhistoriska Riksmuseet), P.O. Box 50007, 104 05 Stockholm, Sweden, catalogue number GEO-NRM #20210001.
Geological Setting of Type Material:
From a late-stage, low-temperature assemblage in cavities of a magnetite-bearing dolomitic rock, LĂ„ngban, Sweden.
Associated Minerals at Type Locality:
CalciteChrysotileDolomiteNorbergitePhlogopite
Pyroaurite
Reference:
Zhitova, Elena S., Chukanov, Nikita V., Jonsson, Erik, Pekov, Igor V., Belakovskiy, Dmitry I., Vigasina, Marina F., Zubkova, Natalia V., Van, Konstantin V., Britvin, Sergey N. (2021) Erssonite, CaMg7Fe3+2(OH)18(SO4)2⋅12H2O, a new hydrotalcite-supergroup mineral from LĂ„ngban, Sweden. Mineralogical Magazine, 85 (5) 817-826 doi:10.1180/mgm.2021.70

Synonyms of ErssoniteHide

Other Language Names for ErssoniteHide

Dutch:Erssoniet
German:Erssonit

Relationship of Erssonite to other SpeciesHide

Member of:
Wermlandite Group > Hydrotalcite Supergroup
Other Members of Wermlandite Group:
KarchevskyiteMg18Al9(OH)54Sr2(CO3)9(H2O)6(H3O)5Trig.
MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : R3m
NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.
NikischeriteFe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : P3c1

Common AssociatesHide

Associations Based on Photo Data:
3 photos of Erssonite associated with DolomiteCaMg(CO3)2
3 photos of Erssonite associated with Serpentine SubgroupD3[Si2O5](OH)4
3 photos of Erssonite associated with MagnetiteFe2+Fe3+2O4
3 photos of Erssonite associated with CalciteCaCO3

Related Minerals - Strunz-mindat GroupingHide

7.DF.Siligiite[Pb(H2O)5(SO4)][Zn9(OH)18]Mon. 2/m : P21/c
7.DF.AlcaparrosaiteK3Ti4+Fe3+(SO4)4O(H2O)2Mon. 2/m : B2/b
7.DF.FlaggitePb4Cu2+4Te6+2(SO4)2O11(OH)2(H2O)Tric. 1 : P1
7.DF.BairditePb2Cu2+4Te6+2O10(OH)2(SO4) · H2OMon. 2/m : P21/c
7.DF.TzeferisiteCaZn8(SO4)2(OH)12Cl2(H2O)9Trig. 3m(32/m) : R3c
7.DF.Cherokeeite[Pb2Zn(OH)4](SO4) · H2OMon. 2/m : P21/c
7.DF.Ammoniomathesiusite(NH4)5(UO2)4(SO4)4(VO5) · 4H2OTet. 4/m : P4/n
7.DF.Sigogglinite[Pb6Zn(OH)8]2(SO4)6 · (H2O)8-xMon. 2/m : P2/c
7.DF.XBlueridgeite[Pb8Zn3Cu2+(OH)16](SO4)2(S2O3)2 · 2H2OMon. 2/m : P21/c
7.DF.PoellmanniteCa6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
7.DF.Carlsonite(NH4)5Fe3+3O(SO4)6 · 7H2OTric. 1 : P1
7.DF.Cuprocherokeeite[Pb8Zn3Cu2+(OH)16](SO4)4 · 4H2OMon. 2/m : P21/c
7.DF.Haywoodite[Pb(H2O)10][Zn12(OH)20(H2O)(SO4)3]Tric. 1 : P1
7.DF.ChromschieffelinitePb10Te6+6O20(OH)14(CrO4)(H2O)5Orth. 222 : C2221
7.DF.05UklonskoviteNaMg(SO4)F · 2H2OMon. 2/m : P21/m
7.DF.10KainiteKMg(SO4)Cl · 3H2OMon. 2/m : B2/m
7.DF.10KaliochalciteKCu2(SO4)2[(OH)(H2O)]Mon. 2/m : B2/m
7.DF.15NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
7.DF.17GenplesiteCa3Sn(SO4)2(OH)6 · 3H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
7.DF.17'Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate)'Ba3Sb5+[(Si,S)O3(OH)]2(OH,O)6 · 3H2O Trig. 3 : P3
7.DF.20SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 222 : P212121
7.DF.20MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm(2/m2/m2/m) : Pnma
7.DF.25FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
7.DF.25MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2OHex. 6 : P63
7.DF.25SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
7.DF.25DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2OHex. 6m2 : P62c
7.DF.30Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
7.DF.35MetavoltineK2Na6Fe2+Fe3+6O2(SO4)12 · 18H2OTrig.
7.DF.40LannoniteMg2Ca4Al4(SO4)8F8 · 24H2OTet. 4/m : I4/m
7.DF.40VlodavetsiteAlCa2(SO4)2F2Cl · 4H2OTet. 4/m : I4/m
7.DF.45PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2OMon. 2/m : B2/b
7.DF.50GordaiteNaZn4(SO4)(OH)6Cl · 6H2OTrig. 3 : P3
7.DF.50CalamaiteNa2TiO(SO4)2 · 2H2OOrth. mmm(2/m2/m2/m) : Ibam
7.DF.52Huizingite-(Al)[(NH4)9(SO4)2][(Al,Fe3+)3(OH)2(H2O)4(SO4)6]Tric. 1 : P1
7.DF.52ScordariiteK8(Fe3+0.67◻0.33)[Fe3+3O(SO4)6]2 · 14H2OTrig. 3 : R3
7.DF.55Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
7.DF.55GiacovazzoiteK5Fe3+3O(SO4)6 · 10H2OMon. 2/m : P21/c
7.DF.57MagnanelliiteK3Fe3+2(SO4)4(OH)(H2O)2Mon. 2/m : B2/b
7.DF.60ArzruniteCu4Pb2(SO4)(OH)4Cl6 · 2H2O (?)Orth.
7.DF.60EvdokimoviteTl4(VO)3(SO4)5(H2O)5Mon. 2/m : P21/c
7.DF.62Bridgesite-(Ce)CaCe2Cu6(SO4)4(OH)12 · 8H2OMon. 2/m : B2/m
7.DF.65ElyitePb4Cu(SO4)O2(OH)4 · H2OMon. 2/m : P21/c
7.DF.70YecoraiteFe3+3Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O
7.DF.70LautenthalitePbCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/c
7.DF.75RiomarinaiteBi(SO4)(OH) · H2OMon. 2/m : P21/c
7.DF.80DukeiteBi3+24Cr6+8O57(OH)6 · 3H2OTrig. 3m : P31c

Other InformationHide

IR Spectrum:
Raman spectroscopy shows the presence of typical bands for S–O bonds attributed to intercalated SO42– anions and structural OH– anions together with the absence of C–O bonds, attributed to carbonate anions
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for ErssoniteHide

References for ErssoniteHide

Localities for ErssoniteHide

Showing 1 localities.

This 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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Sweden (TL)
 
  • VĂ€rmland County
    • Filipstad
      • LĂ„ngban Ore District
Miyawaki et al. (2021) +1 other reference
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