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Formicaite

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Solongo B deposit, Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
© 2007, JGW

Formula:
Ca[HCOO]
 
2
System:TetragonalColour:White
Lustre:VitreousHardness:1
Name:For its chemical composition: the FORMIate of CAlcium.


Calcium formiate

Classification of Formicaite

IMA status:Approved 1998
Strunz 8th edition ID:9/A.02-05
Nickel-Strunz 10th (pending) edition ID:10.AA.05

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
A : Formates, Acetates, etc.
Dana 7th edition ID:50.2.3.1
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Type Occurrence of Formicaite

Type Locality:Solongo B deposit, Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia

Physical Properties of Formicaite

Lustre:Vitreous
Colour:White
Streak:White
Hardness (Mohs):1

Crystallography of Formicaite

Crystal System:Tetragonal

Optical Data of Formicaite

Type:Uniaxial (+)
RI values: nω = 1.553 nε = 1.573
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Formicaite

Formula:
Ca[HCOO]
 
2
Essential elements:C, Ca, H, O
All elements listed in formula:C, Ca, H, O

Relationship of Formicaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
10.AA.10Dashkovaite
Mg[HCOO]
 
2
 · 2H
 
2
O
10.AA.20Acetamide
CH
 
3
CONH
 
2
10.AA.25Calclacite
Ca[Cl|CH
 
3
COO] · 5H
 
2
O
10.AA.30Paceite
CaCu(CH
 
3
COO)
 
4
·6H
 
2
O
10.AA.35Hoganite
Cu(CH
 
3
COO)
 
2
·H
 
2
O

Other Names for Formicaite

Synonyms:
IMA1998-030
Other Languages:
German:Formicait
Spanish:Formicaita

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 Formicaite

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 128(2): 43-47.

Internet Links for Formicaite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Formicaite details from Handbook of Mineralogy (PDF)
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    Localities for Formicaite

    (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.
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Polar Yakutia
          • Dogdo River Basin
            • Tas-Khayakhtakh Range
    		http://maurice.strahlen.org/yakutia/yakutia.htm
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Vitim Plateau
    		[AmMin 85:1322]
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Krasnoturjinsk (Bogolovsk; Krasnotur'insk; Krasnoturyinsk)
            • Turya river
              • Turjinsk
    		[AmMin 85:1322]
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