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Calcio-Olivine

Big Photo

Ettringer Bellerberg Mt., Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany
© C.H.M.-Schäfer

Formula:
Ca
 
2
[SiO
 
4
]
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., Verkhnechegemskiy volcanic structure, Kabardino-Balkarian Republic, Northern Caucasus Region, Russia

Chemical Properties of Calcio-Olivine

Formula:
Ca
 
2
[SiO
 
4
]
Essential elements:Mg, O, Si
All elements listed in formula:Ca, O, Si

Relationship of Calcio-Olivine to other Species

Related to:
  • Olivine Group
    • 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+
     
    		,Al,Fe
    3+
     
    		)
     
    2
    		[SiO
     
    4
    		]
     
    3
    9.AD.25Grossular
    Ca
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    9.AD.25Henritermierite
    Ca
     
    3
    		(Mn
    3+
     
    		,Al)
     
    2
    		[(OH)
     
    4
    		|(SiO
     
    4
    		)
     
    2
    		]
    9.AD.25Hibschite
    Ca
     
    3
    		Al
     
    2
    		[(OH)
     
    6-1
    		|(SiO
     
    4
    		)
     
    1.5-2.5
    		]
    9.AD.25Hydroandradite
    9.AD.25Katoite
    Ca
     
    3
    		Al
     
    2
    		[(OH)
     
    8-6
    		|(SiO
     
    4
    		)
     
    1-1.5
    		]
    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+
     
    		,Fe
    2+
     
    		)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
     
    6
    		(Al,Mg)
     
    4
    		[Cl
     
    3
    		|O
     
    4
    		|{(Si,Al,Fe
    3+
     
    		)O
     
    4
    		}
     
    3
    		]
    9.AD.25Holtstamite
    Ca
     
    3
    		(Al,Mn
    3+
     
    		)
     
    2
    		(SiO
     
    4
    		)
     
    2
    		(OH)
     
    4
    9.AD.30Coffinite
    (U,Th)[(OH)
     
    4x
    		|(SiO
     
    4
    		)
     
    1-x
    		]
    9.AD.30Hafnon
    (Hf,Zr)[SiO
     
    4
    		]
    9.AD.30Thorite
    (Th,U)[SiO
     
    4
    		]
    9.AD.30Thorogummite
    (Th,U)[(OH)
     
    4x
    		|(SiO
     
    4
    		)
     
    1-x
    		]
    9.AD.30Zircon
    Zr[SiO
     
    4
    		]
    9.AD.35Huttonite
    Th[SiO
     
    4
    		]
    9.AD.35Tombarthite-(Y)
    Y
     
    4
    		[HSiO
     
    4
    		]
     
    3
    9.AD.40Eulytine
    Bi
     
    4
    		[SiO
     
    4
    		]
     
    3
    9.AD.45Reidite
    Zr[SiO
     
    4
    		]

    Other Names for Calcio-Olivine

    Synonyms:
    gamma-Ca2SiO4Lime-Olivine
    German names:
    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.

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

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    Localities for Calcio-Olivine

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    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.
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    (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 Mts
        • Daun
          • Üdersdorf
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
        • Mayen
          • Ettringen
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise, München (2. Auflage), 1987
    Russia
     
    • Northern Caucasus Region
      • Kabardino-Balkarian Republic
        • Verkhnechegemskiy volcanic structure
    		A. E. Zadov data
    Mineral and/or Locality
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