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Kottenheimite

A valid IMA mineral species
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About KottenheimiteHide

03423540015781019813416.jpg
Kottenheim, Germany
Formula:
Ca 3Si(SO4)2(OH)6 · 12H2O
Colour:
Colorless, white
Lustre:
Vitreous, Silky
Hardness:
2 - 2½
Specific Gravity:
1.92
Crystal System:
Hexagonal
Name:
Named for the community Kottenheim, located near Mayen and the Bellerberg volcano, Germany.
Closely related to hielscherite.


Unique IdentifiersHide

Mindat ID:
42534
Long-form identifier:
mindat:1:1:42534:8
GUID
(UUID V4):
6960675e-4b0d-4145-9e73-5d4f20591fef

IMA Classification of KottenheimiteHide

Classification of KottenheimiteHide

7.DG.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3

Mineral SymbolsHide

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

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

Physical Properties of KottenheimiteHide

Vitreous, Silky
Transparency:
Transparent
Comment:
vitreous in separate crystals and silky in aggregates
Colour:
Colorless, white
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
1.92(2) g/cm3 (Measured)    1.93 g/cm3 (Calculated)

Optical Data of KottenheimiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.490(2) nε = 1.477(2)
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemistry of KottenheimiteHide

Mindat Formula:
Ca 3Si(SO4)2(OH)6 · 12H2O

Crystallography of KottenheimiteHide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 11.1548(3) Å, c = 10.5702(3) Å
Ratio:
a:c = 1 : 0.948
Unit Cell V:
1139.04 ų
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019043KottenheimiteChukanov N V, Britvin S N, Van K V, Mockel S, Zadov A E (2012) Kottenheimite, Ca3Si(OH)6(SO4)2*12H2O, a new member of the ettringite group from the Eifel area, Germany Rhineland-Palatinate, Germany The Canadian Mineralogist 50 55-632012Bellerberg, near Kottenheim, Eastern Eifel area,0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.72 Å(100)
5.590 Å(69)
4.645 Å(26)
3.840 Å(54)
3.455 Å(21)
2.751 Å(34)
2.536 Å(27)
2.185 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of KottenheimiteHide

General Appearance of Type Material:
Snow-white radiating and random aggregates of hair-like subparallel clusters to 0.2 mm.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4102/1.
Geological Setting of Type Material:
Late hydrothermal assemblage related to alkali olivine basalt.
Reference:
Chukanov, N.V., Britvin S.N., Van, K.V., Möckel, S., Zadov, A.E. (2012) Kottenheimite, Ca3Si(OH)6(SO4)2·12H2O, a new member of the ettringite group from the Eifel area, Germany. The Canadian Mineralogist: 50: 55-63.

Synonyms of KottenheimiteHide

Relationship of Kottenheimite to other SpeciesHide

Other Members of this group:
BentoriteCa6Cr2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
BuryatiteCa3(Si,Fe3+,Al)(SO4)B(OH)4(OH,O)6 · 12H2OTrig. 3m : P3 1c
CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
ChiyokoiteCa3Si(CO3)[B(OH)4]O (OH)5 · 12H2OHex. 6 : P63
EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
HielscheriteCa3Si(SO4)(SO3)(OH)6 · 11H2OHex. 6 : P63
ImayoshiiteCa3Al(CO3)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex. 6 : P63
Micheelsenite(Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2OHex. 6 : P63
SiwaqaiteCa6Al2(CrO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
SturmaniteCa6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
TatarinoviteCa3Al(SO4)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
UM2008-07-CO:AlBCaHSSiCa6(Al,Si)2(CO3,SO4)2[B(OH)4](OH,O)12 · 26H2O
Unnamed (possible Mn(IV) analogue of Sturmanite)Ca6Mn4+2(SO4)2[B(OH)4](OH)10O2 · nH2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Kottenheimite associated with ÅkermaniteCa2Mg[Si2O7]

Related Minerals - Strunz-mindat GroupingHide

7.DG.MathesiusiteK5(UO2)4(SO4)4(VO5) · 4H2OTet. 4/m : P4/n
7.DG.05DarapskiteNa3(SO4)(NO3) · H2OMon. 2/m : P21/m
7.DG.10Clinoungemachite(Na, K, Fe, SO4)Mon. 2/m
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.10UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.15BentoriteCa6Cr2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
7.DG.15EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex. 6 : P63
7.DG.15SturmaniteCa6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
7.DG.15BuryatiteCa3(Si,Fe3+,Al)(SO4)B(OH)4(OH,O)6 · 12H2OTrig. 3m : P3 1c
7.DG.15BiruniteCa18(SiO3)8.5(CO3)8.5SO4 · 15H2O(?)
7.DG.15HielscheriteCa3Si(SO4)(SO3)(OH)6 · 11H2OHex. 6 : P63
7.DG.15ImayoshiiteCa3Al(CO3)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
7.DG.15TatarinoviteCa3Al(SO4)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
7.DG.15SiwaqaiteCa6Al2(CrO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15ChiyokoiteCa3Si(CO3)[B(OH)4]O (OH)5 · 12H2OHex. 6 : P63
7.DG.20RapidcreekiteCa2(SO4)(CO3) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2OOrth.
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2OOrth.
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
7.DG.40CarlosruiziteK6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)Orth.
7.DG.55Ramazzoite[Mg8Cu12(PO4)(CO3)4(OH)24(H2O)20][(H0.33SO4)3(H2O)36]Iso. 4 3m : P4 3m
7.DG.60WitzkeiteNa4K4Ca(NO3)2(SO4)4 · 2H2O Mon. 2/m : B2/b

Other InformationHide

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 KottenheimiteHide

References for KottenheimiteHide

Localities for KottenheimiteHide

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.

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.
France
 
  • Occitanie
    • Aveyron
      • Rodez
        • Sévérac-d'Aveyron
publication date: November 2018 +1 other reference
Germany (TL)
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Vordereifel
        • Ettringen
Williams et al. (2011) +2 other references
Italy
 
  • Lazio
    • Viterbo Province
      • Onano
Campostrini et al. (2018)
 
Mineral and/or Locality  
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