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Dashkovaite

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About DashkovaiteHide

Yekaterina Romanovna Vorontsova-Dashkova
Formula:
Mg(HCOO)2 · 2H2O
Colour:
White
Lustre:
Vitreous
Hardness:
1
Specific Gravity:
1.74 (Calculated)
Crystal System:
Monoclinic
Name:
For Yekaterina Romanovna Vorontsova-Dashkova (1744-1796), President of the Russian Academy of Sciences.
Magnesium formate dihydrate.


Classification of DashkovaiteHide

Approved
Approval Year:
2000
10.AA.10

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
A : Formates, Acetates, etc.
Dana 7th ed.:
50.2.4.1

Pronounciation of DashkovaiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of DashkovaiteHide

Vitreous
Transparency:
Transparent
Colour:
White
Streak:
White
Hardness:
Tenacity:
Sectile
Fracture:
Irregular/Uneven
Density:
1.74 g/cm3 (Calculated)

Optical Data of DashkovaiteHide

Type:
Biaxial (+)
RI values:
nα = 1.465 nβ = 1.486 nγ = 1.516
2V:
Calculated: 81°
Max Birefringence:
δ = 0.051
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong

Chemical Properties of DashkovaiteHide

Formula:
Mg(HCOO)2 · 2H2O

Crystallography of DashkovaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.64(1) Å, b = 7.15(1) Å, c = 9.38(1) Å
β = 98°
Ratio:
a:b:c = 1.208 : 1 : 1.312
Unit Cell V:
573.82 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Fibrous, in porous aggregates
Comment:
Space group by analogy to synthetic

Type Occurrence of DashkovaiteHide

Synonyms of DashkovaiteHide

Other Language Names for DashkovaiteHide

Related Minerals - Nickel-Strunz GroupingHide

10.AA.05FormicaiteCa(HCOO)2Tet.
10.AA.20AcetamideCH3CONH2Trig. 3m : R3c
10.AA.25CalclaciteCa(CH3COO)Cl · 5H2OMon. 2/m : P21/b
10.AA.30PaceiteCaCu(CH3COO)4 · 6H2OTet.
10.AA.35HoganiteCu(CH3COO)2 · H2OMon. 2/m : B2/b

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for DashkovaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 129(6): 49-53.

Internet Links for DashkovaiteHide

Localities for DashkovaiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Irkutsk Oblast
    • Zheleznogorsk (Korshunikha)
[ZVMO 129/6 (2000), 49; MinRec 32:500]
  • Zabaykalsky Krai
    • Buriatia Republic (Buryatia)
      • Vitim Plateau
Mineral and/or Locality  
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