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Calcio-olivine

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Formula:
Ca2SiO4
System:
Orthorhombic
Member of:
Name:
In allusion to its composition, containing dominant calcium, and its relationship to the olivine series.
Dimorph of:
Olivine Group. The calcium analogue of Fayalite, Forsterite, and Tephroite. The low-temperature, orthorhombic polymorph of Larnite.

May occur as the result of the conversion of Larnite, which is metastable below 520° C.

Classification of Calcio-olivine

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1877
9.AD.10

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
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First Recorded Occurrence of Calcio-olivine

Crystallography of Calcio-olivine

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 5.074Å, b = 11.211Å, c = 6.753Å
Ratio:
a:b:c = 0.453 : 1 : 0.602
Unit Cell Volume:
V 384.14 ų (Calculated from Unit Cell)
Comment:
Space group Pbnm.

Chemical Properties of Calcio-olivine

Formula:
Ca2SiO4
Essential elements:
All elements listed in formula:

Relationship of Calcio-olivine to other Species

Member of:
Other Members of Group:
FayaliteFe22+SiO4
ForsteriteMg2SiO4
GlaucochroiteCaMn2+SiO4
KirschsteiniteCaFe2+SiO4
LaihuniteFe2+Fe23+(SiO4)2
Liebenbergite(Ni,Mg)2SiO4
MonticelliteCaMgSiO4
Olivine(Mg,Fe2+)2SiO4
Roepperite (of Brush)(Fe22+,Mn,Zn)SiO4
TephroiteMn22+SiO4
9.AD.05LarniteCa2SiO4
9.AD.15MerwiniteCa3Mg(SiO4)2
9.AD.20BredigiteCa7Mg(SiO4)4
9.AD.25AndraditeCa3Fe23+(SiO4)3
9.AD.25AlmandineFe32+Al2(SiO4)3
9.AD.25Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
9.AD.25GoldmaniteCa3V23+(SiO4)3
9.AD.25GrossularCa3Al2(SiO4)3
9.AD.25HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
9.AD.25HibschiteCa3Al2(SiO4)3-x(OH)4x
9.AD.25HydroandraditeCa3Fe23+(SiO4)3-x(OH)4x
9.AD.25KatoiteCa3Al2(SiO4)3-x(OH)4x
9.AD.25KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3
9.AD.25KnorringiteMg3Cr2(SiO4)3
9.AD.25MajoriteMg3(Fe2+,Si,Al)2(SiO4)3
9.AD.25MorimotoiteCa3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
9.AD.25PyropeMg3Al2(SiO4)3
9.AD.25SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3
9.AD.25SpessartineMn32+Al2(SiO4)3
9.AD.25UvaroviteCa3Cr2(SiO4)3
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3
9.AD.25HoltstamiteCa3(Al,Mn3+)2(SiO4)2(OH)4
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2
9.AD.25Momoiite(Mn2+,Ca)3V23+(SiO4)3
9.AD.25EltyubyuiteCa12Fe103+Si4O32Cl6
9.AD.25HutcheoniteCa3Ti2(SiAl2)O12
9.AD.30Coffinite(U4+,Th)(SiO4)1-x(OH)4x
9.AD.30HafnonHfSiO4
9.AD.30Thorite(Th,U)SiO4
9.AD.30ZirconZrSiO4
9.AD.30StetinditeCe4+SiO4
9.AD.35HuttoniteThSiO4
9.AD.35Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2x
9.AD.40EulytineBi4(SiO4)3
9.AD.45ReiditeZrSiO4

Other Names for Calcio-olivine

Name in Other Languages:

Other Information

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 Calcio-olivine

Reference List:
Acta Crystallographica (1964): 17.

American Mineralogist (1966): 51: 1766.

Udagawa S, Urabe K, Natsume M, Yano T (1980): Refinement of the crystal structure of γ-Ca2SiO4. Cement and Concrete Research 10, 139-144.

Hentschel, G. (1987), Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage).

Gobechiya E R, Yamnova N A, Zadov A E, Gazeev V M (2008): Calcio-olivine γ-Ca2SiO4: I. Rietveld refinement of the crystal structure. Crystallography Reports 53, 404-408.

Zadov, A.E. et al. (20008): Doklady Earth Science 423A, 1431-xx.

Zadov A.E., Gazeyev V.M., Pertsev N.N., Gurbanov A.G., Gobechiya E.R., Yamnova N.A., Chukanov N.V. (2008) Calcioolivine gamma-Ca2SiO4 - an old and new mineral species. ZVMO, N6, 46-57 (in Russ.). [engl. transl. in: Geology of Ore Deposits 51 (2009) 741-749]

Internet Links for Calcio-olivine

Localities for Calcio-olivine

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Daun
        • Üdersdorf
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
      • Mayen
        • Ettringen
          • Bellerberg volcano
Hentschel, G., Die Mineralien der Eifelvulkane, Weise, München (2. Auflage), 1987
            • Southern lava flow
              • Mayener Feld
Rüdinger, B.; Tillmanns, E. Hentschel, G. (1993): Bellbergite – a New Mineral with the Zeolite Structure Type EAB, Mineralogy and Petrology 48, 147-152
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Narin-Kunta
Armbruster, T., Lazic, B., Gfeller, F., Galuskin, E.V., Galuskina, I.O., Savelyeva, V.B., Zadov, A.E., Pertsev, N.N., Dzierżanowski, P. (2011): Chlorine content and crystal chemistry of dellaite from the Birkhin gabbro massif, Eastern Siberia, Russia. Mineralogical Magazine, 75, 379-394.
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera)
Zadov, A.E. et al., Doklady Earth Science 423A, 1431 (2008); Zadov A.E., Gazeyev V.M., Pertsev N.N., Gurbanov A.G., Gobechiya E.R., Yamnova N.A., Chukanov N.V. (2008) Calcioolivine gamma-Ca2SiO4 - an old and new mineral species. - ZVMO, N6, pp. 46-57 (in Rus.).
USA
 
  • Texas
    • Culberson Co.
      • Apache Peak area
Bridge, T. (1966) Am. Min. 51, 1766-1774.
Mineral and/or Locality  
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