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Kottenheimite

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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.


Classification of KottenheimiteHide

Approved
Approval Year:
2011
First Published:
2012

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

Chemical Properties of KottenheimiteHide

Formula:
Ca 3Si(SO4)2(OH)6·12H2O
IMA Formula:
Ca3Si(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

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)

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:
BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
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]0.5(AsO3)0.5}(OH)6·12H2OHex. 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(Ca,Y)3Al(HPO4,CO3)(CO3)(OH)6 · 12H2OHex.
SiwaqaiteCa6Al2(CrO4)3(OH)12·26H2OTrig. 3m : P3 1c
SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
TatarinoviteСа3Al(SO4)[B(OH)4](OH)6·12H2OHex. 6 : P63
ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Kottenheimite associated with ÅkermaniteCa2Mg(Si2O7)

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.

References for KottenheimiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Britvin, S.N., Zadov, A.E. and Van, K.V. (2011) Kottenheimite, IMA 2011-038. CNMNC Newsletter No. 10, October 2011, page 2557.
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.
Campostrini,I., Di Domenico,D.,Demartin,F., Russo,M. (2018) Kottenheimite,Ca3Si(SO4)2(OH)6 .12H2 0, della cava Montenero di Onano (Viterbo,Lazio): secondo ritrovamento mondiale. Micro (Associazione Micromineralogica Italiana): 16(1): 38-43.

Internet Links 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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
France
 
  • Occitanie
    • Aveyron
Kruszewski, Ł., Gatel, P., Thiéry, V., Moszumańska, I., and Kusy, D. (2018) Crystallochemical Behavior of Slag Minerals and the Occurrence of Potentially New Mineral Species from Lapanouse-de-Sévérac, France. In: Stracher, G.B. (Ed.) Coal and Peat Fires: A Global Perspective, Vol. 5: Case Studies - Advances in Field and Laboratory Research, xx-xx (in press; publication date: November 2018).
Germany (TL)
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mayen
        • Ettringen
          • Bellerberg volcano
Chukanov, N.V., Britvin, S.N., Zadov, A.E. and Van, K.V. (2011) Kottenheimite, IMA 2011-038. CNMNC Newsletter No. 10, October 2011, page 2557; 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. Canadian Mineralogist 50, 55-63.; Blaß, G. & Kruijen, F. (2013): Die Mineralogischen Neuigkeiten aus der Vulkaneifel. Mineralien-Welt 24 (3), 33-41.
Italy
 
  • Lazio
    • Viterbo Province
      • Làtera volcano
        • Onano
Campostrini, I., Di Domenico, D., Demartin, F., Russo, M. (2018) Kottenheimite, Ca3Si(SO4)2(OH)4 · 12H2O, della Cava Montenero di Onano (Viterbo, Lazio): secondo ritrovamento mondiale. Micro, 16, 1-2018, 38-43.
 
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