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Bradaczekite Mineral Data

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General Bradaczekite Information

Help on Chemical  Formula: Chemical Formula: NaCu4(AsO4)3
Help on Composition: Composition: Molecular Weight = 686.00 gm
   Sodium    4.02 %  Na    5.42 % Na2O
   Zinc      0.95 %  Zn    1.19 % ZnO
   Copper   34.27 %  Cu   38.59 % Cu2O
   Arsenic  32.76 %  As   50.26 % As2O5
   Oxygen   27.99 %  O
           ______        ______ 
           100.00 %       95.45 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.2Cu3.7Zn0.1(AsO4)3
Help on Environment: Environment: Fumarolic sublimate product. Alluaudite-wyllieite group; structure
Help on IMA Status: IMA Status: Approved IMA 2000 (Dana # Added)
Help on Locality: Locality: North Breach of the Tolbachik Great fissure eruption, Kamchatka Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Hans Bradaczek (1940-), crystallographer of the Free University of Berlin.
Help on Synonym: Synonym: IMA2000-002

Bradaczekite Image

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Comments: SEM image of the aggregates of bradaczekite crystals. (CanMin, v39 , p 1116).
Location: North Breach of the Great fissure Tolbachik eruption (GFTE) in 1975-1976, Kamchatka Peninsula, Russia. Scale: Magnification: ~ 600x.
© Canadian Mineralogist

Bradaczekite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9691:1:0.5843
Help on Cell Dimensions: Cell Dimensions: a = 12.051, b = 12.434, c = 7.2662, Z = 4; beta = 117.942° V = 961.86 Den(Calc)= 4.74
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.43(1)(112,310), 3.21(0.35)(002), 2.683(0.3)(240),2.791(0.24)(402), 3.6(0.21)(202,131), 6.22(0.21),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 3 0 1) ( 1 1 0) ( 0 0 1) ( 3 2 1) ( 1 3 1) ( 3 1 1) ( 0 1 0) ( 1 1 1) ( 1 0 0) ( 3 4 1)

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Physical Properties of Bradaczekite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark blue.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: pale blue white

Optical Properties of Bradaczekite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1857,KC= 0.1839
Ncalc = 1.87
Help on Optical Data: Optical Data: Biaxial (-), a=1.76, b=1.92, g=1.96, bire=0.2000

Calculated Properties of Bradaczekite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Bradaczekite =4.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005251504
Boson Index = 0.9994748496
Help on Photoelectric: Photoelectric: PEBradaczekite = 38.93 barns/electron
U=PEBradaczekite x rElectron Density= 171.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bradaczekite is Not Radioactive

Bradaczekite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.02)(A+ B++)5 (XO4)3
  (38.02.04)Alluaudite-Wyllieite Group (Wyllieite Subgroup) Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21/n 2/m Bobfergusonite Na2Mn5FeAl(PO4)6 P 21/n 2/m Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m Ferrorosemaryite! []NaFeFeAl(PO4)3 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 08.AC.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.10 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m
08.AC.10 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m
08.AC.10 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 21/a 2/m
08.AC.10 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/c 2/m
08.AC.10 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 21/a 2/m
08.AC.10 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m
08.AC.10 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m
08.AC.10 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m
08.AC.10 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 21/a 2/m
08.AC.10 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m
08.AC.10 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m
08.AC.10 Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m
08.AC.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m
08.AC.10 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m

Other Bradaczekite Information

Help on References: References: NAME( AmMin, Vol 87, p 765) PHYS. PROP.(AmMin, Vol 87, p 765) OPTIC PROP.(AmMin, Vol 87, p 765)
Help on See Also: See Also: Links to other databases for Bradaczekite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 08.AC.10





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