Emmonsite Mineral Data

[Current Minerals] [Order Status] [Policies] [e-Bay Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels

General Emmonsite Information

Chemical Formula:

Fe+++2Te++++3O9•2(H2O)

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

Empirical Formula:

Fe³⁺₂Te₃O₉•2(H₂O)

Environment:

Secondary mineral formed by oxidation of Tellurium bearing minerals.

IMA Status:

Valid Species (Pre-IMA) 1885

Locality:

Tombstone, Tombstone District, Cochise County, Arizona, USA Link to MinDat.org Location Data.

Name Origin:

Named for S. F. Emmons

Name Pronunciation:

Emmonsite + Pronunciation

Synonym:

Durdenite

ICSD 9259

PDF 7-404

Emmonsite Image

Images:

Emmonsite

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

Images:

Emmonsite Schmitterite

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

Images:

Emmonsite

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

Emmonsite Crystallography

Axial Ratios:

a:b:c =0.982:1:0.9437

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

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.14(1), 2.52(0.9), 2.87(0.9),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Pertlik F , Tschermaks Mineralogische und Petrographische Mitteilungen , 18 (1972) p.157-168, Der strukturtyp von emmonsit, {Fe2[TeO3]3*H2O}*xH2O (x=0-1), Locality: Tombstone, Arizona, USA

Physical Properties of Emmonsite

Cleavage:

{010} Perfect

Color:

Yellow, Greenish yellow.

Density:

4.52 - 4.53, Average = 4.52

Diaphaneity:

Transparent to Translucent

Habit:

Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Optical Properties of Emmonsite

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

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

Electron Density:

Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Emmonsite =4.53 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Emmonsite= 201.19 barns/electron
U=PE_Emmonsite x rElectron Density= 809.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Emmonsite is Not Radioactive

Emmonsite Classification

Dana Class:

34.03.03.01 (34)Selenites - Tellurites - Sulfites

(34.03)Dana Type

(34.03.03)Dana Group

34.03.03.01 Emmonsite Fe2Te3O9•2(H2O) P1 1

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

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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 - Glendale Community College
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info

Search for Emmonsite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Emmonsite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Emmonsite Mineral Data :

Ask about Emmonsite 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 Español

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

Emmonsite

Fe+++2Te++++3O9•2(H2O)
Dana No: 34.03.03.01 Strunz No: 04.JM.10
Locality:

Notes: