Mineralogy Database

Emmonsite Mineral Data

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General Emmonsite Information

Help on Chemical  Formula: Chemical Formula: Fe+++2Te++++3O9•2(H2O)
Help on Composition: Composition: Molecular Weight = 674.52 gm
   Iron       16.56 %  Fe   23.67 % Fe2O3
   Tellurium  56.75 %  Te   70.98 % TeO2
   Hydrogen    0.60 %  H     5.34 % H2O
   Oxygen     26.09 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+2Te3O9•2(H2O)
Help on Environment: Environment: Secondary mineral formed by oxidation of Tellurium bearing minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1885
Help on Locality: Locality: Tombstone, Tombstone District, Cochise County, Arizona, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for S. F. Emmons
Help on Name Pronunciation: Name Pronunciation: Emmonsite + Pronunciation Say EMMONSITE
Help on Synonym: Synonym: Durdenite
  ICSD 9259
  PDF 7-404

Emmonsite Image

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Comments: Quartz with small blebs of pea green emmonsite.
Location: Barrbolla Mine, Moctezuma, Sonora, Mexico. Scale: Bleb size 2 mm.
© John Veevaert

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  Schmitterite   Emmonsite

Comments: Yellow schmitterite with green emmonsite.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: Green, mossy emmonsite on matrix..
Location: Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Emmonsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.982:1:0.9437
Help on Cell Dimensions: Cell Dimensions: a = 7.874, b = 8.018, c = 7.567, Z = 2; alpha = 95.6°, beta = 94.3°, gamma = 84.7° V = 472.09 Den(Calc)= 4.74
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.14(1), 2.52(0.9), 2.87(0.9),

Physical Properties of Emmonsite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Yellow, Greenish yellow.
Help on Density: Density: 4.52 - 4.53, Average = 4.52
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull

Optical Properties of Emmonsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2224,KPDmeas= 0.2329,KC= 0.2354
Ncalc = 2.06 - 2.12
Help on Optical Data: Optical Data: Biaxial (-), a=1.962, b=2.09, g=2.1-2.12, bire=0.1380-0.1580, 2V(Calc)=28-48, 2V(Meas)=23. Dispersion relatively strong.

Calculated Properties of Emmonsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Emmonsite =4.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEEmmonsite = 201.19 barns/electron
U=PEEmmonsite x rElectron Density= 809.82 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Emmonsite is Not Radioactive

Emmonsite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.03)Dana Type
  (34.03.03)Dana Group Emmonsite Fe2Te3O9•2(H2O) P1 1
Help on  Strunz Class: Strunz Class: 04.JM.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JM -Tellurites without additional anions, with H2O
04.JM.10 Emmonsite Fe2Te3O9•2(H2O) P1 1

Other Emmonsite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Emmonsite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
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: 04.JM.10





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