Novakite Mineral Data

Novakite Mineral Data
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General Novakite Information

Help on Chemical Formula: Chemical Formula: (Cu,Ag)21As10
Help on Composition: Composition: Molecular Weight = 2,172.33 gm
   Copper   55.58 %  Cu
   Silver    9.93 %  Ag
   Arsenic  34.49 %  As
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu19Ag2As10
Help on Environment: Environment: In hydrothermal carbonate veins cutting diopside hornfels lenses in pyroxene gneiss and mica shist.
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Cerny Dul mine, near Berghaus, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jiri Novak (1902-1971), Czech mineralogist.
Help on Name Pronunciation: Name Pronunciation: Novakite Say NOVAKITE
 

Novakite Image

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Novakite   Berzelianite

Comments: Gray metallic dendritic novakite in white calcite with tarnished black berzelianite.
Location: Cerny Dul, Bohemia, Vychodocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Novakite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.3892:1:0.8544
Help on Cell Dimensions: Cell Dimensions: a = 16.269, b = 11.711, c = 10.007, Z = 4; beta = 112.7° V = 1,758.91 Den(Calc)= 8.20
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.877(1), 1.959(0.9), 1.998(0.8),
 

Physical Properties of Novakite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel gray, Black.
Help on Density: Density: 6.7
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Tarnishes - Freshly fractured surfaces form a surface oxidation film
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Novakite

Help on RL Anisotrophism: RL Anisotrophism: Medium, dark blue-gray and light brown-ocher.
Help on RL Color: RL Color: White with a light cream tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Novakite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   43.60   49.00 
   
 420 nm   45.40   50.50 
 440 nm   47.20   52.00 
 460 nm   48.30   53.00 
 480 nm   49.10   53.90 
 500 nm   49.80   54.60 
 520 nm   50.20   55.20 
 540 nm   50.60   55.60 
 560 nm   50.90   56.00 
 580 nm   51.20   56.30 
 600 nm   51.30   56.60 
 620 nm   51.40   56.80 
 640 nm   51.50   56.90 
 660 nm   51.50   57.00 
 680 nm   51.50   57.10 
 700 nm   51.50   57.20 
Calculated Relative Intensity Colors of Novakite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%
R1                      
R2                      
 

Calculated Properties of Novakite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.36 gm/cc
note: Specific Gravity of Novakite =8.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PENovakite = 75.98 barns/electron
U=PENovakite x rElectron Density= 559.25 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Novakite is Not Radioactive
 

Novakite Classification
Help on Dana Class: Dana Class: 02.04.18.01 (02)Sulfides - Including Selenides and Tellurides
  (02.04)where Am Bn Xp, with (m+n):p=2:1
  (02.04.18)Dana Group
 
02.04.18.01 Novakite (Cu,Ag)21As10 C 2/m ? 2/m
Help on Strunz Class: Strunz Class: 02.AA.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.A - Simple Sulfides, Selenides, etc
  02.AA -Alloys of metalloids with Cu, Ag, Sn, Au
 
02.AA.15 Novakite (Cu,Ag)21As10 C 2/m ? 2/m
 

Other Novakite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Novakite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Novakite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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

Novakite

(Cu,Ag)21As10
Dana No: 02.04.18.01 Strunz No: 02.AA.15
Locality:

 

Notes: