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Kilchoanite

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About KilchoaniteHide

Formula:
Ca6(SiO4)(Si3O10)
Originally assumed to be Ca3Si2O7.
Colour:
Colorless
Crystal System:
Orthorhombic
Name:
For the community of Kilchoan, Scotland, the type locality.
This page provides mineralogical data about Kilchoanite.


Classification of KilchoaniteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1961
9.BJ.45

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
58.3.2.1

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
3 : Insular, Mixed, Single, and Larger Tetrahedral Groups with insular single and triple groups (n=1, 3)
14.5.5

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Physical Properties of KilchoaniteHide

Transparency:
Transparent, Translucent
Colour:
Colorless
Streak:
White
Cleavage:
None Observed

Optical Data of KilchoaniteHide

Type:
Biaxial (-)
RI values:
nα = 1.647 nβ = 1.649 nγ = 1.650
2V:
Measured: 60° , Calculated: 70°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v

Chemical Properties of KilchoaniteHide

Formula:
Ca6(SiO4)(Si3O10)

Originally assumed to be Ca3Si2O7.
Common Impurities:
Fe,Al

Crystallography of KilchoaniteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 11.42(5) Å, b = 5.09(5) Å, c = 21.95(5) Å
Ratio:
a:b:c = 2.244 : 1 : 4.312
Unit Cell V:
1,275.91 ų (Calculated from Unit Cell)
Z:
8

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014452KilchoaniteTaylor H F W (1971) The crystal structure of kilchoanite, Ca6(SiO4)(Si3O10), with some comments on related phases Mineralogical Magazine 38 26-311971Kilchoan, Ardnamurchan, Scotland0293
0014491KilchoaniteKimata M (1989) The crystal structure of manganoan kilchoanite, Ca2.33Mn0.67Si2O7: a site preference rule for the substitution of Mn for Ca Mineralogical Magazine 53 625-63119890293
CIF Raw Data - click here to close

Type Occurrence of KilchoaniteHide

General Appearance of Type Material:
coarse (1-2 mm) irregular interlocking crystals
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 119424, 119425.
Geological Setting of Type Material:
High temperature contact metamorphism in siliceous limestone.
Associated Minerals at Type Locality:
Reference:
Agrell, S.O., Gay, P. (1961) Kilchoanite, a polymorph of rankinite. Nature: 189: 743-743.

Other Language Names for KilchoaniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Kilchoanite associated with VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
1 photo of Kilchoanite associated with WollastoniteCaSiO3
1 photo of Kilchoanite associated with Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)

Related Minerals - Nickel-Strunz GroupingHide

9.BJ.ArsenmedaiteMn2+6 As5+Si5O18(OH)Mon. 2/m
9.BJ.05OrientiteCa8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O Orth.
9.BJ.10RosenhahniteHCa3[Si3O9(OH)]Tric.
9.BJ.15TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
9.BJ.20Thalénite-(Y)Y3Si3O10FMon.
9.BJ.25TiragalloiteMn2+4As5+Si3O12(OH)Mon. 2/m
9.BJ.30MedaiteMn2+6V5+Si5O18(OH)Mon.
9.BJ.35RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2 · 2H2OMon. 2
9.BJ.40Ardennite-(As)Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m)
9.BJ.40Ardennite-(V)Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m) : Pmmn
9.BJ.50KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
9.BJ.50Prismatine(◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22Orth.
9.BJ.55ZunyiteAl13Si5O20(OH,F)18ClIso. 4 3m : F4 3m
9.BJ.60HubeiteCa2Mn2+Fe3+[HSi4O13] · 2H2OTric.
9.BJ.65Cassagnaite(Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8Orth. mmm (2/m 2/m 2/m) : Cmcm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.5.1WollastoniteCaSiO3Tric. 1 : P1
14.5.2Wollastonite-7TCaSiO3
14.5.3Wollastonite-2MCaSiO3Mon. 2/m : P21/b
14.5.4RankiniteCa3Si2O7Mon. 2/m : P21/b
14.5.6LarniteCa2SiO4Mon. 2/m
14.5.7BredigiteCa7Mg(SiO4)4Orth.
14.5.8HatruriteCa3(SiO4)OTrig.
14.5.9RosenhahniteHCa3[Si3O9(OH)]Tric.
14.5.10DellaiteCa6Si3O11(OH)2Tric.
14.5.11AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
14.5.12XonotliteCa6(Si6O17)(OH)2Mon. 2/m
14.5.13FoshagiteCa4(Si3O9)(OH)2Tric.
14.5.14HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
14.5.15JaffeiteCa6(Si2O7)(OH)6Trig. 3 : P3
14.5.16SuoluniteCa2(H2Si2O7) · H2OOrth.
14.5.17KillalaiteCa6.4(H0.6Si2O7)2(OH)2Mon.
14.5.18OkeniteCa10Si18O46 · 18H2OTric. 1 : P1
14.5.19RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
14.5.20TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
14.5.21GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
14.5.22FoshallasiteCa3[Si2O7] · 3H2O(?)
14.5.23Tobermorite[Ca4Si6O17 · 2H2O] · (Ca · 3H2O)Orth.
14.5.24Clinotobermorite[Ca4Si6O17 · 2H2O] · (Ca · 3H2O)Mon.
14.5.25NekoiteCa3Si6O15 · 7H2OTric. 1 : P1
14.5.26Plombièrite[Ca4Si6O16(OH)2 · 2H2O] · (Ca · 5H2O)Orth.
14.5.27JenniteCa9(Si3O9)2(OH)8 · 8H2OTric.

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 KilchoaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Agrell, S.O., Gay, P. (1961) Kilchoanite, a polymorph of rankinite. Nature: 189: 743-743.
Fleischer, M. (1961) New mineral names. American Mineralogist: 46: 1203.
Fleischer, M. (1962) New mineral names. American Mineralogist: 47: 414-420.
Bennett, J.M., Gard, J.A., Speakman, K., Taylor, H.F.W. (1966) Ca8Si5O18 and the nature of "γ-dicalcium silicate hydrate". Nature: 209: 1127-1127.
Mitsuda, T., Fukuo, K. (1969) Synthesis of kilchoanite. Mineralogical Journal: 6(1-2): 17-35.
Black, P.M. (1969) Rankinite and kilchoanite from Tokatoka, New Zealand. Mineralogical Magazine: 37: 517-519.
Taylor, H.F.W. (1971) Crystal structure of kilchoanite, Ca6(SiO4)(Si3O10), with some comments on related phases. Mineralogical Magazine: 38: 26-31.
Mitsuda, T. (1972) Low-temperature synthesis of kilchoanite from quartz-lime mixtures by a new method. Mineralogical Journal: 7(1): 108-114.
Kimata, M. (1989) The crystal structure of manganoan kilchoanite, Ca2.33Mn0.67Si2O7: a site preference rule for the substitution of Mn for Ca. Mineralogical Magazine: 53: 625-631.
Galuskin, E.V., Gfeller, F., Savelyeva, V.B., Armbruster, T., Lazic, B., Galuskina, I.O., Többens, D.M., Zadov, A.E., Dzierżanowski, P., Pertsev, N.N., Gazeev, V.M. (2012) Pavlovskyite Ca8(SiO4)2(Si3O10): a new mineral of altered silicate-carbonate xenoliths from the two Russian type localities, Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus. American Mineralogist: 97: 503-512.
Dambrauskas, T., Baltakys, K., Eisinas, A., Siauciunas, R. (2017) A study on the thermal stability of kilchoanite synthesized under hydrothermal conditions. Journal of Thermal Analysis and Calorimetry: 127: 229–238.

Internet Links for KilchoaniteHide

Localities for KilchoaniteHide

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.
Italy
 
  • Veneto
    • Padova Province
      • Galzignano Terme
Cámara, F., Nestola, F., Bindi, L., Guastoni, A., Zorzi, F., Peruzzo, L., Pedron, D. (2012) Tazzoliite: a new mineral with a pyrochlore-related structure from the Euganei Hills, Padova, Italy. Mineralogical Magazine, 76, 4, 827-838; Fabris, L., Guastoni, A. (2014): Provincia di Padova. In: Zorzi, F., Boscardin, M., (eds.), Minerali del Veneto. Alla scoperta dei tesori della nostra regione. Museo di Storia Naturale e Archeologia di Montebelluna - Treviso, Cierre Edizioni, Sommacampagna, pages 121-141.
Japan
 
  • Okayama Prefecture
    • Takahashi City
      • Bicchu-cho (Bitchu-cho)
        • Fuka
Henmi et al (1975) Koubutsugaku Zasshi, 12, 205-214.
Middle East
 
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
New Zealand
 
  • Northland Region
    • Kaipara District
Black, P. M. (1969): Rankinite and kilchoanite from Tokatoka, New Zealand. Mineralogical Magazine 37, 517-519.
Baker, C.K., Black, P.M. (1980) Assimilation and metamorphism at a basalt limestone contact, Tokatoka, New Zealand. Mineralogical Magazine, Vol. 43:330, 797-807.
Poland
 
  • Lower Silesian Voivodeship
    • Kłodzko County
      • Gmina Nowa Ruda
        • Przygórze
          • Bolesław Mine
Łukasz Kruszewski PXRD data
Romania
 
  • Brașov
    • Racoş
Szakáll, S., Kristály, F., 2010. Mineralogy of Székelyland, Eastern Transylvania, Romania. Sfântu Gheorghe-Miercurea Ciuc-Târgu Mureş. 2010.
  • Harghita
    • Odorheiu Secuiesc (Székelyudvarhely; Oderhellen)
      • Racoş (Racoşu de Jos)
Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
Russia
 
  • Irkutsk Oblast
    • Narin-Kunta
Savel'eva V.B., Uschapovskaya Z.F., Nartova N.V. (1992) On kilchoanite rock from Priolkhonie (Western Pribaikalie), // Zapiski VMO, v.121, N3, pp. 111-117 (in Rus.)
UK (TL)
 
  • Scotland
    • Highland
      • Fort William and Ardnamurchan
        • Ardnamurchan
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Agrell, S.O. and Gay, P. (1961) Kilchoanite, a Polymorph of Rankinite. Nature, 189, 743; Agrell, S.O. (1965) Polythermal Metamorphism of Limestones at Kilchoan, Ardnamurchan. Mineralogical Magazine, vol. 34, n° 268, 1-15.; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177 (referring to Agrell);
USA
 
  • Texas
    • Brewster Co.
      • Christmas Mountains
Rocks & Minerals (1991): 66:3: 196-224.
 
Mineral and/or Locality  
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