Dwornikite Mineral Data + Say DWORNIKITE

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General Dwornikite Information

Help on Chemical  Formula: Chemical Formula: (Ni,Fe++)SO4·(H2O)
Help on Composition: Composition: Molecular Weight = 172.06 gm
   Iron       8.11 %  Fe   10.44 % FeO
   Nickel    25.58 %  Ni   32.56 % NiO
   Hydrogen   1.17 %  H    10.47 % H2O
   Sulfur    18.64 %  S    46.53 % SO3
   Oxygen    46.49 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ni0.75Fe2+0.25(SO4)·(H2O)
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 71347
  PDF 21-974
 

Dwornikite Image

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Dwornikite

Comments: Green earthy, powdery dwornikite on or replacing millerite as acicular crystals in 1cm vug.
Location: Lipovka Ni deposit, Rezh District, Central Urals, Urals Region, Russia. Scale: Picture size 1.2 cm.
© Tom Loomis / Dakota Matrix

Dwornikite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.902:1:0.9857
Help on Cell Dimensions: Cell Dimensions: a = 6.839, b = 7.582, c = 7.474, Z = 4; beta = 117.85° V = 342.66 Den(Calc)= 3.33
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.342(1), 4.732(1), 3.024(0.7),
Click Here for Large Dwornikite Structure Window Crystal Structure:

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Wildner M , Giester G , Neues Jahrbuch fur Mineralogie, Monatshefte , 1991 (1991) p.296-306, The crystal structures of kieserite-type compounds., I. Crystal structures of Me(II)SO4*H2O (Me = Mn,Fe,Co,Ni,Zn), Locality: synthetic

 

Physical Properties of Dwornikite

Help on Color: Color: White.
Help on Density: Density: 3.34
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Dwornikite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1892,KPDmeas= 0.1886,KC= 0.1949
Help on Optical Data: Optical Data: Biaxial (?), b=1.63
 

Calculated Properties of Dwornikite

Help on Electron Density: Electron Density:

relectron=3.31 gm/cc
note: rDwornikite =3.33 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00623
Boson Index = 0.99377
Help on Photoelectric: Photoelectric:

PEDwornikite = 13.53 barns/electron
U=PEDwornikite x relectron= 44.79 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Dwornikite is Not Radioactive

 

Dwornikite Classification

Help on  Dana Class: Dana Class: 29.6.2.6 (29)Hydrated Acid and Sulfates
  (29.6)where A XO4 · x(H2O)
  (29.6.2)Kieserite Group (Mono-hydrates)
 
29.6.2.1 Kieserite MgSO4·(H2O) C 2/c 2/m
 
29.6.2.2 Szomolnokite FeSO4·(H2O) A2/a 2/m
 
29.6.2.3 Szmikite MnSO4·(H2O) A2/a 2/m
 
29.6.2.4 Poitevinite (Cu,Fe,Zn)SO4·(H2O) P1 1
 
29.6.2.5 Gunningite (Zn,Mn)SO4·(H2O) A2/a 2/m
 
29.6.2.6 Dwornikite (Ni,Fe)SO4·(H2O) C 2/c 2/m
 
29.6.2.7 Cobaltkieserite! CoSO4·H2O C 2/c 2/m
Help on  Strunz Class: Strunz Class: VI/C.01-40 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size
  VI/C.01 - Kieserite group
 
VI/C.01-10 Kieserite MgSO4·(H2O) C 2/c 2/m
 
VI/C.01-20 Szomolnokite FeSO4·(H2O) A2/a 2/m
 
VI/C.01-30 Szmikite MnSO4·(H2O) A2/a 2/m
 
VI/C.01-35 Cobaltkieserite! CoSO4·H2O C 2/c 2/m
 
VI/C.01-40 Dwornikite (Ni,Fe)SO4·(H2O) C 2/c 2/m
 
VI/C.01-50 Poitevinite (Cu,Fe,Zn)SO4·(H2O) P1 1
 
VI/C.01-60 Gunningite (Zn,Mn)SO4·(H2O) A2/a 2/m
 
VI/C.01-70 Sanderite MgSO4·2(H2O) Mono ? Mono
 

Other Dwornikite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Dwornikite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Dwornikite

(Ni,Fe++)SO4·(H2O)
Dana No: 29.6.2.6 Strunz No: VI/C.01-40
Locality:

 

Notes:

 

 
   
 
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