Mineralogy Database

Ecandrewsite Mineral Data

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General Ecandrewsite Information

Help on Chemical  Formula: Chemical Formula: (Zn,Fe++,Mn++)TiO3
Help on Composition: Composition: Molecular Weight = 157.27 gm
   Titanium   30.44 %  Ti   50.79 % TiO2
   Manganese   6.99 %  Mn    9.02 % MnO
   Zinc       24.95 %  Zn   31.05 % ZnO
   Iron        7.10 %  Fe    9.14 % FeO
   Oxygen     30.52 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn0.6Fe2+0.2Mn2+0.2TiO3
Help on Environment: Environment: In quartz-rich metasediments of the amphibolite-granulite facies.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Melbourne Rockwell mine, Little Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ernest Clayton Andrews (1870-1948), New South Wales government geologist, who mapped the Broken Hill Region.
Help on Name Pronunciation: Name Pronunciation: Ecandrewsite + Pronunciation Say ECANDREWSITE
Help on Synonym: Synonym: ICSD 22382
  PDF 26-1500
 

Ecandrewsite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.75756
Help on Cell Dimensions: Cell Dimensions: a = 5.09, c = 14.036, Z = 6; V = 314.93 Den(Calc)= 4.98
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.73(1), 2.53(0.9), 1.71(0.7),
 

Physical Properties of Ecandrewsite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish black, Dark brown, Black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: brown black
 

Optical Properties of Ecandrewsite

Help on Dichroism (e): Dichroism (e): deep orange brown.
Help on Dichroism (w): Dichroism (w): deep orange brown.
Help on Optical Data: Optical Data: Uniaxial (+).
  NCalc= 2.41 - from Gladstone-Dale relationship (KC = 0.2836) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Strong, greenish gray to black.
Help on RL Color: RL Color: Grayish white with a pinkish tint.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ecandrewsite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   17.20   19.90 
   
 546 nm   17.20   19.70 
 589 nm   17.00   19.60 
 650 nm   16.80   19.20 
Calculated Relative Intensity Colors of Ecandrewsite in Air
Relative
Intensity
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 520%
R1                      
R2                      
 

Calculated Properties of Ecandrewsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.70 gm/cc
note: Specific Gravity of Ecandrewsite =4.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEEcandrewsite = 21.78 barns/electron
U=PEEcandrewsite x rElectron Density= 102.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ecandrewsite is Not Radioactive
 

Ecandrewsite Classification

Help on  Dana Class: Dana Class: 04.03.05.04 (04)Simple Oxides
  (04.03)with a cation charge of 3+ (A+++2 O3)
  (04.03.05)Ilmenite Group
 
04.03.05.01 Ilmenite FeTiO3 R 3 3
 
04.03.05.02 Geikielite MgTiO3 R 3 3
 
04.03.05.03 Pyrophanite MnTiO3 R 3 3
 
04.03.05.04 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3
 
04.03.05.05 Melanostibite Mn(Sb,Fe)O3 R 3 3
 
04.03.05.06 Brizziite-III NaSbO3 R 3 3
 
04.03.05.07 Akimotoite! (Mg,Fe)SiO3 R 3 3
Help on  Strunz Class: Strunz Class: 04.CB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.C - Metal:Oxygen = 2:3, 3:5, and Similar
  04.CB -With medium-sized cations
 
04.CB.05 Auroantimonate* AuSbO3 Ortho ? Ortho
 
04.CB.05 Geikielite MgTiO3 R 3 3
 
04.CB.05 Brizziite-III NaSbO3 R 3 3
 
04.CB.05 Brizziite-VII NaSbO3 R 3 3
 
04.CB.05 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3
 
04.CB.05 Corundum Al2O3 R 3c 3 2/m
 
04.CB.05 Eskolaite Cr2O3 R 3c 3 2/m
 
04.CB.05 Hematite Fe2O3 R 3c 3 2/m
 
04.CB.05 Karelianite V2O3 R 3c 3 2/m
 
04.CB.05 Ilmenite FeTiO3 R 3 3
 
04.CB.05 Melanostibite Mn(Sb,Fe)O3 R 3 3
 
04.CB.05 Pyrophanite MnTiO3 R 3 3
 
04.CB.05 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig
 
04.CB.05 Tistarite! Ti2O3 R 3c 3 2/m
 

Other Ecandrewsite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.74,p501,1989) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Ecandrewsite :
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
15 - WWW-MINCRYST

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

Ecandrewsite

(Zn,Fe++,Mn++)TiO3
Dana No: 04.03.05.04 Strunz No: 04.CB.05
Locality:

 

Notes:

 

 
   
 


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