Mineralogy Database

Mcgovernite Mineral Data

Search Webmineral :
  
Advertisment

General Mcgovernite Information

Help on Chemical  Formula: Chemical Formula: Mn9Mg4Zn2As2Si2O17(OH)14
Help on Composition: Composition: Molecular Weight = 1,438.55 gm
   Magnesium   6.76 %  Mg   11.21 % MgO
   Manganese  34.37 %  Mn   44.38 % MnO
   Zinc        9.09 %  Zn   11.32 % ZnO
   Silicon     3.90 %  Si    8.35 % SiO2
   Arsenic    10.42 %  As   15.98 % As2O5
   Hydrogen    0.98 %  H     8.77 % H2O
   Oxygen     34.48 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+9Mg4Zn2As2Si2O17(OH)14
Help on Environment: Environment: Metamorphosed zinc-manganese deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1927
Help on Locality: Locality: Sterling Hill, Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for J. J. McGovern (1915-), Franklin miner and mineral collector.
Help on Name Pronunciation: Name Pronunciation: Mcgovernite + Pronunciation Say MCGOVERNITE
 

Mcgovernite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Mcgovernite

Comments: Golden sub-metallic micaceous mcgovernite with black franklinite, red willemite, and white calcite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mcgovernite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:25
Help on Cell Dimensions: Cell Dimensions: a = 8.22, c = 205.5, Z = 20; V = 12,025.03 Den(Calc)= 3.97
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.54(1), 2.35(0.6), 2.66(0.6),2.37(0.5), 2.8(0.5), 3.24(0.3), 3.43(0.3), 4.06(0.3),
 

Physical Properties of Mcgovernite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Bronze brown, Light brown, Dark reddish brown, Reddish brown.
Help on Density: Density: 3.72
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: brown
 

Optical Properties of Mcgovernite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1911,KPDmeas= 0.2039,KC= 0.2008
Ncalc = 1.75 - 1.8
Help on Optical Data: Optical Data: Uniaxial (+), w=1.757, e=1.76, bire=0.0030.
 

Calculated Properties of Mcgovernite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.56 gm/cc
note: Specific Gravity of Mcgovernite =3.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMcgovernite = 20.77 barns/electron
U=PEMcgovernite x rElectron Density= 74.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mcgovernite is Not Radioactive
 

Mcgovernite Classification

Help on  Dana Class: Dana Class: 43.04.09.01 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.09)Mcgovernite Group
 
43.04.09.01 Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 R 3c 3 2/m
 
43.04.09.02 Turtmannite! (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20x R 3c 3 2/m
Help on  Strunz Class: Strunz Class: 08.BE.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1
 
08.BE.45 Dixenite CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6 R 3 3
 
08.BE.45 Hematolite (Mn,Mg,Al)15(AsO3)(AsO4)2(OH)23 R 3 3
 
08.BE.45 Kraisslite (Mn,Mg)24Zn3Fe(AsO3)2(AsO4)3(SiO4)6(OH)18 P 6322 6 2 2
 
08.BE.45 Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 R 3c 3 2/m
 
08.BE.45 Turtmannite! (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20x R 3c 3 2/m
 
08.BE.45 Arakiite! (Zn,Mn)(Mn,Mg)12(Fe,Al)2(AsO3)(AsO4)2(OH)23 Cc m
 

Other Mcgovernite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Mcgovernite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - Franklin Minerals(Palache)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

Search for Mcgovernite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Mcgovernite :

Ask about Mcgovernite 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 Mcgovernite Specimen Label here :

Mcgovernite

Mn9Mg4Zn2As2Si2O17(OH)14
Dana No: 43.04.09.01 Strunz No: 08.BE.45
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.