Dashkovaite Mineral Data

Dashkovaite Mineral Data
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General Dashkovaite Information

Help on Chemical Formula: Chemical Formula: Mg(HCOO)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 172.49 gm
   Magnesium  14.09 %  Mg
   Hydrogen    3.33 %  H
   Carbon     27.85 %  C
   Oxygen     54.73 %  O
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: MgH5.72(C2)O5.9
Help on Environment: Environment: Found in dolomite marble core. Second natural formate.
Help on IMA Status: IMA Status: Approved IMA 2000 (Dana # Added)
Help on Locality: Locality: Korshunovskoye boron deposit in the Irkutsk district, Siberia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for E. R. Dashkova (1744-1796), former director of the Saint Petersburg Academy of Sciences.
Help on Synonym: Synonym: IMA2000-006
 

Dashkovaite Image

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Dashkovaite

Comments: White fibrous dashkovaite.
Location: Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 2.3 mm.
© Thomas Witzke / Abraxas-Verlag

Dashkovaite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.2083:1:1.3118
Help on Cell Dimensions: Cell Dimensions: a = 8.64, b = 7.15, c = 9.38, Z = 4; beta = 98° V = 573.82 Den(Calc)= 2.00
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.4(1)(112), 4.9(0.9)(111), 3.68(0.8)(210),4.3(0.7)(200), 4.64(0.7)(002), 2.87(0.4), 3.05(0.4),
Click Here for Large Dashkovaite Structure Window Crystal Structure:

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Osaki K , Nakai Y , Watanabe T , Journal of the Physical Society of Japan , 19 (1964) p.717-723, The crystal structure of magnesium formate dihydrate and manganous formate, dihydrate, Locality: synthetic

 

Physical Properties of Dashkovaite

Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 1 - Talc
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Dashkovaite

Help on Optical Data: Optical Data: Biaxial (+), a=1.465, b=1.486, g=1.516, bire=0.0510
 

Calculated Properties of Dashkovaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.06 gm/cc
note: Specific Gravity of Dashkovaite =2.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEDashkovaite = 0.54 barns/electron
U=PEDashkovaite x rElectron Density= 1.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dashkovaite is Not Radioactive
 

Dashkovaite Classification
Help on Dana Class: Dana Class: 50.02.06.02 (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
Help on Strunz Class: Strunz Class: 10.AA.10 10 - ORGANIC COMPOUNDS
  10.A - Salts of Organic Acids
  10.AA -Formates, Acetates, etc.
 
10.AA.10 Dashkovaite! Mg(HCOO)2•2(H2O) P 21/c 2/m
 

Other Dashkovaite Information
Help on References: References: NAME( AmMin, Vol 86, p 1534) PHYS. PROP.(AmMin, Vol 86, p 1534) OPTIC PROP.(AmMin, Vol 86, p 1534)
Help on See Also: See Also: Links to other databases for Dashkovaite :
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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Dashkovaite

Mg(HCOO)2•2(H2O)
Dana No: 50.02.06.02 Strunz No: 10.AA.10
Locality:

 

Notes: