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Holdenite Mineral Data

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General Holdenite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8
Help on Composition: Composition: Molecular Weight = 1,018.89 gm
   Magnesium   1.43 %  Mg    2.37 % MgO
   Manganese  29.66 %  Mn   38.29 % MnO
   Zinc       19.25 %  Zn   23.96 % ZnO
   Silicon     2.76 %  Si    5.90 % SiO2
   Arsenic    14.71 %  As   22.56 % As2O5
   Hydrogen    0.79 %  H     7.07 % H2O
   Oxygen     31.41 %  O
             ______        ______ 
             100.00 %      100.16 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+5.5Mg0.6Zn3(AsO4)2(SiO4)(OH)8
Help on Environment: Environment: Secondary mineral in veinlets and other voids in a metamorphosed zinc deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1927
Help on Locality: Locality: Franklin and Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Albert Fairchild Holden (1866-1913), mining engineer from Salt Lake City, Utah, USA.
Help on Name Pronunciation: Name Pronunciation: Holdenite + Pronunciation Say HOLDENITE
Help on Synonym: Synonym: ICSD 100075
  PDF 29-903

Holdenite Image

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Comments: Pink translucent holdenite vein with red willemite and black franlinite.
Location: Sterling Mine, Ogdensburg, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Holdenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3811:1:0.2764
Help on Cell Dimensions: Cell Dimensions: a = 11.99, b = 31.46, c = 8.697, Z = 8; V = 3,280.55 Den(Calc)= 4.13
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Abma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.838(1), 2.583(0.8), 3.582(0.8),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
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Drag2 - Resize

S - Stereo
I - Indicies
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F - Fit to Screen
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Help on Above

Forms: ( 2 1 1) ( 1 3 1) ( 0 1 0) ( 1 1 0) ( 7 16 2) ( 1 1 1) ( 1 0 0)

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Physical Properties of Holdenite

Help on Cleavage: Cleavage: {010} Poor
Help on Color: Color: Yellowish red, Dark red, Pink, Orange.
Help on Density: Density: 4.11
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Holdenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1876,KPDmeas= 0.1885,KC= 0.1909
Ncalc = 1.78 - 1.79
Help on Optical Data: Optical Data: Biaxial (+), a=1.769, b=1.77, g=1.785, bire=0.0160, 2V(Calc)=30, 2V(Meas)=30.33. Dispersion r > v distinct.

Calculated Properties of Holdenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Holdenite =4.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHoldenite = 27.65 barns/electron
U=PEHoldenite x rElectron Density= 107.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Holdenite is Not Radioactive

Holdenite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.07)Dana Group Holdenite (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8 Abma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BE.55 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.55 Holdenite (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8 Abma 2/m 2/m 2/m

Other Holdenite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Holdenite :
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

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Dana No: Strunz No: 08.BE.55





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