Formicaite Mineral Data

General Formicaite Information

Chemical Formula:

Ca(HCOO)2

Composition:

Molecular Weight = 130.11 gm

Calcium 30.80 % Ca

Hydrogen 1.55 % H

Carbon 18.46 % C

Oxygen 49.19 % O

______

100.00 %

Empirical Formula:

Ca2(H)2(C)2(O₂)

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

The Solondo borno deposit, Buryatia and the Novofrolovskoye copper deposit, Urals, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after its composition.

Synonym:

Calcium Formate

IMA1998-030

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Formicaite Crystallography

Axial Ratios:

a:c = 1:1.39778

Cell Dimensions:

a = 6.77, c = 9.463, Z = 4; V = 433.72 Den(Calc)= 1.99

Crystal System:

Tetragonal - TrapezohedralH-M Symbol (4 2 2) Space Group: P 4₁2₁2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.4(1), 5.54(0.9), 2.859(0.8),2.196(0.7), 1.947(0.6), 3.19(0.6), 2.046(0.5),

Physical Properties of Formicaite

Cleavage:

{100} Perfect

Color:

White, Light blue.

Density:

1.9

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

1 - Talc

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Formicaite

Optical Data:

Uniaxial (+), w=1.553, e=1.573, bire=0.0200.

Calculated Properties of Formicaite

Electron Density:

Bulk Density (Electron Density)=2.02 gm/cc
note: Specific Gravity of Formicaite =1.99 gm/cc.

Fermion Index:

Fermion Index = 0.0026851063
Boson Index = 0.9973148937

Photoelectric:

PE_Formicaite= 3.90 barns/electron
U=PE_Formicaite x rElectron Density= 7.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Formicaite is Not Radioactive

Formicaite Classification

Dana Class:

50.02.06.01 (50)Salts of Organic Acids

(50.02)(Mellitates, Citrates, Cyanates, and Acetates)

(50.02.06)Formicaite Series

50.02.06.01 Formicaite! Ca(HCOO)2 P 4₁2₁2 4 2 2

50.02.06.02 Dashkovaite! Mg(HCOO)2•2(H2O) P 2₁/c 2/m

Strunz Class:

10.AA.05 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AA -Formates, Acetates, etc.

10.AA.05 Formicaite! Ca(HCOO)2 P 4₁2₁2 4 2 2

Other Formicaite Information

References:

NAME( MinRec, Vol 31, No 4) PHYS. PROP.(MinRec, Vol 31, No 4) OPTIC PROP.(MinRec, Vol 31, No 4)

See Also:

Links to other databases for Formicaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Formicaite Specimen Label here :

Formicaite

Ca(HCOO)2
Dana No: 50.02.06.01 Strunz No: 10.AA.05
Locality:

Notes: