Aurorite Mineral Data

Aurorite Mineral Data
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General Aurorite Information

Help on Chemical Formula: Chemical Formula: (Mn,Ag,Ca)Mn++++3O7•3(H2O)
Help on Composition: Composition: Molecular Weight = 398.70 gm
   Calcium     2.01 %  Ca    2.81 % CaO
   Manganese  48.23 %  Mn    8.90 % MnO / 65.42 % MnO2
   Silver      8.12 %  Ag    8.72 % Ag2O
   Hydrogen    1.52 %  H    13.56 % H2O
   Oxygen     40.13 %  O
             ______        ______ 
             100.00 %       99.40 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.5Ag0.3Ca0.2Mn4+3O7•3(H2O)
Help on Environment: Environment: In veinlets filling microfractures in manganoan calcite.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Aurora mine, Treasure Hill, Hamilton, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Aurorite Say AURORITE
 

Aurorite Image

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Aurorite

Comments: Brown, dendritic aurorite in white calcite.
Location: Aurora Mine, Hamilton, White Pine County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aurorite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1:1:1.0889
Help on Cell Dimensions: Cell Dimensions: a = 7.53, b = 7.53, c = 8.2, Z = 2; alpha = 90°, beta = 117.2°, gamma = 120° V = 358.13 Den(Calc)= 3.70
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.94(1), 3.46(0.7), 4.06(0.5),
 

Physical Properties of Aurorite

Help on Color: Color: Grayish black, Black.
Help on Density: Density: 3.8 - 4.1, Average = 3.95
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: brown
 

Optical Properties of Aurorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.26 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.244 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2584,KPDmeas= 0.2532,KC= 0.3419
Ncalc = 2.3 - 2.4
Help on Optical Data: Optical Data: Biaxial (?), a=2
Help on RL Anisotrophism: RL Anisotrophism: Yellow-gray to brownish gray.
Help on RL Bireflectance: RL Bireflectance: Strong, cream white to medium black.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Aurorite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   10.40   36.50 
   
 420 nm   10.30   35.30 
 440 nm   10.20   34.00 
 460 nm    9.99   32.40 
 480 nm    9.67   30.60 
 500 nm    9.49   29.20 
 520 nm    9.31   27.80 
 540 nm    9.16   26.60 
 560 nm    9.11   25.60 
 580 nm    8.93   24.90 
 600 nm    8.88   24.50 
 620 nm    8.87   24.00 
 640 nm    8.85   23.70 
 660 nm    8.84   23.40 
 680 nm    8.82   22.90 
 700 nm    8.80   22.70 
Calculated Relative Intensity Colors of Aurorite in Air
Relative
Intensity		    0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 970%
R1                      
R2                      
 

Calculated Properties of Aurorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.72 gm/cc
note: Specific Gravity of Aurorite =3.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002220344
Boson Index = 0.9997779656
Help on Photoelectric: Photoelectric: PEAurorite = 31.99 barns/electron
U=PEAurorite x rElectron Density= 118.99 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aurorite is Not Radioactive
 

Aurorite Classification
Help on Dana Class: Dana Class: 07.08.02.02 (07)Multiple Oxides
  (07.08)where A B (O)2·x(H2O)
  (07.08.02)Chalcophanite Group
 
07.08.02.01 Chalcophanite (Zn,Fe,Mn)Mn3O7•3(H2O) R 3 3
 
07.08.02.02 Aurorite (Mn,Ag,Ca)Mn3O7•3(H2O) P1 1
 
07.08.02.03 Jianshuiite (Mg,Mn)Mn3O7•3(H2O) R 3 or R 3 Trig
 
07.08.02.04 Ernienickelite NiMn3O7•3(H2O) R 3 or R 3 Trig
Help on Strunz Class: Strunz Class: 04.FL.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FL -Hydroxides with H2O ± (OH); sheets of edge-sharing octahedra
 
04.FL.20 Aurorite (Mn,Ag,Ca)Mn3O7•3(H2O) P1 1
 
04.FL.20 Chalcophanite (Zn,Fe,Mn)Mn3O7•3(H2O) R 3 3
 
04.FL.20 Ernienickelite NiMn3O7•3(H2O) R 3 or R 3 Trig
 
04.FL.20 Jianshuiite (Mg,Mn)Mn3O7•3(H2O) R 3 or R 3 Trig
 

Other Aurorite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Aurorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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

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

Aurorite

(Mn,Ag,Ca)Mn++++3O7•3(H2O)
Dana No: 07.08.02.02 Strunz No: 04.FL.20
Locality:

 

Notes: