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Calcio-olivine

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Formula:
Ca
 
2
SiO
 
4
System:Orthorhombic
Member of:Olivine Group
Name:In allusion to its composition, containing dominant calcium, and its relationship to the olivine series.
Dimorph of:Larnite


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

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1877
Strunz 8th edition ID:8/A.07-40
Nickel-Strunz 10th (pending) edition ID:9.AD.10

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

Type Locality:Lakargi Mt., Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera), Kabardino-Balkarian Republic, Northern Caucasus Region, Russia

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:
Ca
 
2
SiO
 
4
Simplified for copy/paste:Ca2SiO4
Essential elements:Ca, O, Si
All elements listed in formula:Ca, O, Si

Relationship of Calcio-olivine to other Species

Member of:Olivine Group
Other Members of Group:

- +
Fayalite
Fe
2+
2
SiO
 
4
Forsterite
Mg
 
2
SiO
 
4
Glaucochroite
CaMn
2+
 
SiO
 
4
Kirschsteinite
CaFe
2+
 
SiO
 
4
Laihunite
Fe
2+
 
Fe
3+
2
(SiO
 
4
)
 
2
Liebenbergite
(Ni,Mg)
 
2
SiO
 
4
Monticellite
CaMgSiO
 
4
Olivine
(Mg,Fe
2+
 
)
 
2
SiO
 
4
Roepperite (of Brush)
(Fe
2+
2
,Mn,Zn)SiO
 
4
Tephroite
Mn
2+
2
SiO
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
9.AD.05Larnite
Ca
 
2
SiO
 
4
9.AD.15Merwinite
Ca
 
3
Mg(SiO
 
4
)
 
2
9.AD.20Bredigite
Ca
 
7
Mg(SiO
 
4
)
 
4
9.AD.25Andradite
Ca
 
3
Fe
3+
2
(SiO
 
4
)
 
3
9.AD.25Almandine
Fe
2+
3
Al
 
2
(SiO
 
4
)
 
3
9.AD.25Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(SiO
 
4
)
 
3
9.AD.25Goldmanite
Ca
 
3
V
3+
2
(SiO
 
4
)
 
3
9.AD.25Grossular
Ca
 
3
Al
 
2
(SiO
 
4
)
 
3
9.AD.25Henritermierite
Ca
 
3
(Mn
3+
 
,Al)
 
2
(SiO
 
4
)
 
2
(OH)
 
4
9.AD.25Hibschite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
3-x
(OH)
 
4x
9.AD.25Hydroandradite
Ca
 
3
Fe
3+
2
(SiO
 
4
)
 
3-x
(OH)
 
4x
9.AD.25Katoite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
3-x
(OH)
 
4x
9.AD.25Kimzeyite
Ca
 
3
(Zr,Ti)
 
2
((Si,Al,Fe
3+
 
)O
 
4
)
 
3
9.AD.25Knorringite
Mg
 
3
Cr
 
2
(SiO
 
4
)
 
3
9.AD.25Majorite
Mg
 
3
(Fe
2+
 
,Si,Al)
 
2
(SiO
 
4
)
 
3
9.AD.25Morimotoite
Ca
 
3
(Ti,Fe
2+
 
,Fe
3+
 
)
 
2
((Si,Fe
3+
 
)O
 
4
)
 
3
9.AD.25Pyrope
Mg
 
3
Al
 
2
(SiO
 
4
)
 
3
9.AD.25Schorlomite
Ca
 
3
(Ti,Fe
3+
 
)
 
2
((Si,Fe
3+
 
)O
 
4
)
 
3
9.AD.25Spessartine
Mn
2+
3
Al
 
2
(SiO
 
4
)
 
3
9.AD.25Uvarovite
Ca
 
3
Cr
 
2
(SiO
 
4
)
 
3
9.AD.25Wadalite
(Ca,Mg)
 
6
(Al,Fe
3+
 
)
 
4
((Si,Al)O
 
4
)
 
3
O
 
4
Cl
 
3
9.AD.25Holtstamite
Ca
 
3
(Al,Mn
3+
 
)
 
2
(SiO
 
4
)
 
2
(OH)
 
4
9.AD.25Kerimasite
Ca
 
3
Zr
 
2
(SiO
 
4
)(Fe
3+
 
O
 
4
)
 
2
9.AD.25Toturite
Ca
 
3
Sn
 
2
(SiO
 
4
)(Fe
3+
 
O
 
4
)
 
2
9.AD.25Momoiite
(Mn
2+
 
,Ca)
 
3
V
3+
2
(SiO
 
4
)
 
3
9.AD.25Eltyubyuite
Ca
 
12
Fe
3+
10
Si
 
4
O
 
32
Cl
 
6
9.AD.25Hutcheonite
Ca
 
3
Ti
 
2
(SiAl
 
2
)O
 
12
9.AD.30Coffinite
(U
4+
 
,Th)(SiO
 
4
)
 
1-x
(OH)
 
4x
9.AD.30Hafnon
HfSiO
 
4
9.AD.30Thorite
(Th,U)SiO
 
4
9.AD.30Zircon
ZrSiO
 
4
9.AD.30Stetindite
Ce
4+
 
SiO
 
4
9.AD.35Huttonite
ThSiO
 
4
9.AD.35Tombarthite-(Y)
Y
 
4
(Si,H
 
4
)
 
4
O
 
12-x
(OH)
 
4+2x
9.AD.40Eulytine
Bi
 
4
(SiO
 
4
)
 
3
9.AD.45Reidite
ZrSiO
 
4

Other Names for Calcio-olivine

Synonyms:
Calcioolivinegamma-Ca2SiO4Lime-Olivine
Other Languages:
German:Calcio-Olivin

Other Information

Health Warning: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]

Best Localities for Calcio-olivine

Best of Species:Calcio-olivine

Internet Links for Calcio-olivine

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  • Localities for Calcio-olivine

    The 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. ? 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.
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