Calcio-olivine
A valid IMA mineral species - grandfathered
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About Calcio-olivine
Formula:
Ca2SiO4
Colour:
Very light yellowish rose (caused by microinclusions of bernalite), colorless in thin sections
Hardness:
4½
Specific Gravity:
2.986 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
In allusion to its composition, containing dominant calcium, and its relationship to the olivine series.
Type Locality:
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.
May occur as the result of the conversion of larnite, which is metastable below 520°C.
Unique Identifiers
Mindat ID:
9574
Long-form identifier:
mindat:1:1:9574:3
GUID
(UUID V4):
(UUID V4):
67a7cabe-dc36-4983-9b27-e9f7ddad3661
IMA Classification of Calcio-olivine
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Redefined by the IMA
IMA Formula:
Ca2(SiO4)
First published:
1877
Approval history:
Redefined IMA2007 s.p.
Classification of Calcio-olivine
9.AD.10
9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Caol | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Calcio-olivine
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Calcio-olivine
Transparency:
Transparent
Comment:
Glassy
Colour:
Very light yellowish rose (caused by microinclusions of bernalite), colorless in thin sections
Hardness:
4½ on Mohs scale
Comment:
Cleavage or jointing in two directions.
Density:
2.986 g/cm3 (Calculated)
Optical Data of Calcio-olivine
Type:
Biaxial (-)
RI values:
nα = 1.640 - 1.644 nβ = 1.651 - 1.655 nγ = 1.655 - 1.659
2V:
Measured: 69° to 81°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Comments:
colorless in thin section
Comments:
optical data presented are for material from Verkhnechegemsk caldera (Kabardino-Balkaria, Russian Federation) (Zadov et al., 2007). Older data for other occurrences show some different values for R.I.
Chemistry of Calcio-olivine
Mindat Formula:
Ca2SiO4
Elements listed:
Crystallography of Calcio-olivine
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 5.07389(7) Å, b = 11.21128(14) Å, c = 6.75340(9) Å
Ratio:
a:b:c = 0.453 : 1 : 0.602
Unit Cell V:
384.17 ų
Z:
4
Comment:
Space group Pbnm. Cell parameters from Zadov et al. (2008).
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0017745 | Calcio-olivine | Udagawa S, Urabe K, Natsume M, Yano T (1980) Refinement of the crystal structure of gamma-Ca2SiO4 Cement and Concrete Research 10 139-144 | 1980 | synthetic | 0 | 293 | |
0012409 | Calcio-olivine | Gobechiya E R, Yamnova N A, Zadov A E, Gazeev V M (2008) Calcio-olivine gamma-Ca2SiO4: I. Rietveld refinement of the crystal structure Crystallography Reports 53 404-408 | 2008 | Lakargi Mountain, North Caucasus, Kabardino-Balkaria, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.323 Å | (34) |
3.822 Å | (35) |
3.014 Å | (90) |
2.752 Å | (70) |
2.730 Å | (100) |
1.909 Å | (53) |
Comments:
Xenolith no. 3, Lakargi Mountain, Russia. The data are from Zadov et al. (2009).
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
31 : Thermally altered carbonate, phosphate, and iron formations |
Type Occurrence of Calcio-olivine
General Appearance of Type Material:
Rounded grains to 2-3 mm in size.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, no. 3546/1.
Geological Setting of Type Material:
In skarnated xenoliths from acid ignimbrites.
Associated Minerals at Type Locality:
Reference:
Zadov, A.E., Gazeev, V.M., Pertzev, N.N., Gurbanov, A.G., Yamnova, N.A., Gobechiya, E.R., Chukanov, N.V. (2008) Discovery and investigation of a natural analog of calcio-olivine (ϒ-Ca2SiO4). Doklady Earth Sciences: 423A: 1431-1434.
Synonyms of Calcio-olivine
Other Language Names for Calcio-olivine
German:Calcio-Olivin
Relationship of Calcio-olivine to other Species
Member of:
Other Members of this group:
Fayalite | Fe2+2SiO4 | Orth. mmm (2/m 2/m 2/m) |
Forsterite | Mg2SiO4 | Orth. mmm (2/m 2/m 2/m) |
Glaucochroite | CaMn2+SiO4 | Orth. mmm (2/m 2/m 2/m) |
Kirschsteinite | CaFe2+SiO4 | Orth. mmm (2/m 2/m 2/m) : Pnma |
Laihunite | (Fe2+0.5◻0.5)Fe3+[SiO4] | Mon. 2/m : P21/b |
Liebenbergite | Ni2SiO4 | Orth. mmm (2/m 2/m 2/m) |
Monticellite | CaMgSiO4 | Orth. mmm (2/m 2/m 2/m) |
Tephroite | Mn2+2SiO4 | Orth. mmm (2/m 2/m 2/m) : Pnma |
Common Associates
Associated Minerals Based on Photo Data:
3 photos of Calcio-olivine associated with Ternesite | Ca5(SiO4)2(SO4) |
3 photos of Calcio-olivine associated with Jasmundite | Ca11(SiO4)4O2S |
Related Minerals - Strunz-mindat Grouping
9.AD. | Adrianite | Ca12(Al4Mg3Si7)O32Cl6 |
9.AD.05 | Larnite | Ca2SiO4 |
9.AD.15 | Merwinite | Ca3Mg(SiO4)2 |
9.AD.20 | Bredigite | Ca7Mg(SiO4)4 |
9.AD.25 | Andradite | Ca3Fe3+2(SiO4)3 |
9.AD.25 | Almandine | Fe2+3Al2(SiO4)3 |
9.AD.25 | Calderite | Mn2+3Fe3+2(SiO4)3 |
9.AD.25 | Goldmanite | Ca3V3+2(SiO4)3 |
9.AD.25 | Grossular | Ca3Al2(SiO4)3 |
9.AD.25 | Henritermierite | Ca3Mn3+2(SiO4)2[◻(OH)4] |
9.AD.25 | Kimzeyite | Ca3Zr2(SiO4)(AlO4)2 |
9.AD.25 | Knorringite | Mg3Cr2(SiO4)3 |
9.AD.25 | Majorite | Mg3(MgSi)(SiO4)3 |
9.AD.25 | Morimotoite | Ca3(TiFe2+)(SiO4)3 |
9.AD.25 | Pyrope | Mg3Al2(SiO4)3 |
9.AD.25 | Schorlomite | Ca3Ti2(SiO4)(Fe3+O4)2 |
9.AD.25 | Spessartine | Mn2+3Al2(SiO4)3 |
9.AD.25 | Uvarovite | Ca3Cr2(SiO4)3 |
9.AD.25 | Wadalite | (Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3 |
9.AD.25 va | Hydrougrandite | (Ca,Mg,Fe2+)3(Fe3+,Al)2[(OH)4(SiO4)2] |
9.AD.25 va | Yamatoite | (Mn2+,Ca)3(V3+,Al)2(SiO4)3 |
9.AD.25 | Holtstamite | Ca3Al2(SiO4)2[◻(OH)4] |
9.AD.25 | Khoharite | Mg3Fe3+2(SiO4)3 |
9.AD.25 | Kerimasite | Ca3Zr2(SiO4)(Fe3+O4)2 |
9.AD.25 | Toturite | Ca3Sn2(SiO4)(Fe3+O4)2 |
9.AD.25 | Momoiite | Mn2+3V3+2(SiO4)3 |
9.AD.25 | Eringaite | Ca3Sc2(SiO4)3 |
9.AD.25 | Irinarassite | Ca3Sn2(SiO4)(AlO4)2 |
9.AD.25 | Menzerite-(Y) | (Y2Ca)Mg2(SiO4)3 |
9.AD.25 | Eltyubyuite | Ca12Fe3+10Si4O32Cl6 |
9.AD.25 | Blythite | Mn2+3Mn3+2[SiO4]3 |
9.AD.25 | Skiagite | Fe2+3Fe3+2[SiO4]3 |
9.AD.25 | Hutcheonite | Ca3Ti2(SiO4)(AlO4)2 |
9.AD.25 | UM1984-37-SiO:CrMn | Mn2+3Cr3+2(SiO4)3 |
9.AD.25 | Rubinite | Ca3Ti3+2Si3O12 |
9.AD.25 | Nikmelnikovite | Ca12(Fe2+Fe3+3Al3◻)[SiO4]6[◻(OH)4]5◻4 |
9.AD.30 va | Auerlite | near Th(Si,P)O4 |
9.AD.30 | Coffinite | U(SiO4) · nH2O |
9.AD.30 | Hafnon | HfSiO4 |
9.AD.30 | Thorite | Th(SiO4) |
9.AD.30 | Zircon | Zr(SiO4) |
9.AD.30 | Stetindite-(Ce) | Ce(SiO4) |
9.AD.35 | Huttonite | ThSiO4 |
9.AD.35 | Tombarthite-(Y) | Y4(Si,H4)4O12-x(OH)4+2x |
9.AD.40 | Eulytine | Bi4(SiO4)3 |
9.AD.45 | Reidite | ZrSiO4 |
9.AD.55 | Jeffbenite | Mg3Al2Si3O12 |
Other Information
IR Spectrum:
IR-spectrum of calcio-olivine containing strong lines 943, 931, 915, 855 (strongest line), 817, 810 (shoulder), 705, 559, 512, 500, 452, and 440 cm–1.
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 Calcio-olivine
mindat.org URL:
https://www.mindat.org/min-9574.html
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References for Calcio-olivine
Reference List:
Localities for Calcio-olivine
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Germany | |
| Rüdinger et al. (1993) |
| Hentschel (1987) |
in the collection of Christof Schäfer | |
| Hentschel (1987) |
Russia | |
| Cesnokov et al. (1998) |
| Pekov (1998) |
| Cesnokov et al. (1998) |
| Armbruster et al. (2011) +1 other reference |
| Zadov et al. (2008) +2 other references |
USA | |
| Bridge (1966) |
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Xenolith CS-050, Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany