Schneiderhohnite Mineral Data

General Schneiderhohnite Information

Chemical Formula:

Fe++Fe+++3As+++5O13

Composition:

Molecular Weight = 805.99 gm

Iron 27.72 % Fe 8.91 % FeO / 29.72 % Fe₂O₃

Arsenic 46.48 % As 61.37 % As₂O₃

Oxygen 25.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺Fe³⁺₃As₅O₁₃

IMA Status:

Approved IMA 1973

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for Hans Schneiderhï¿½hn (1887-1962), German mineralogist.

Name Pronunciation:

Schneiderhohnite + Pronunciation

Synonym:

Schneiderhoehnite

Schneiderhohnite Image

Images:

Schneiderhohnite

Comments: Quartz with a 0.8 cm partial crystal of schneiderhÃ¶hnite and several smaller complete crystals of schneiderhÃ¶hnite to 3 mm.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Picture size 1.5 cm.
© John Veevaert

Schneiderhohnite Crystallography

Axial Ratios:

a:b:c =0.8909:1:0.9088

Cell Dimensions:

a = 8.924, b = 10.016, c = 9.103, Z = 2; alpha = 59.91°, beta = 112.41°, gamma = 81.69° V = 644.00 Den(Calc)= 4.16

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.891(1), 3.583(1), 7.25(1),

Physical Properties of Schneiderhohnite

Cleavage:

{100} Perfect

Color:

Brown, Black.

Density:

4.3

Diaphaneity:

Opaque

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

3 - Calcite

Luster:

Sub Metallic

Streak:

brownish black

Optical Properties of Schneiderhohnite

Gladstone-Dale:

CI meas= -0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2472,KPDmeas= 0.2605,KC= 0.2546
Ncalc = 2.09 - 2.15

Optical Data:

Biaxial (+), a=2.11, g=2.13, bire=0.0200

Pleochroism (x):

yellow.

Pleochroism (z):

reddish brown.

Calculated Properties of Schneiderhohnite

Electron Density:

Bulk Density (Electron Density)=3.98 gm/cc
note: Specific Gravity of Schneiderhohnite =4.30 gm/cc.

Fermion Index:

Fermion Index = 0.0059996683
Boson Index = 0.9940003317

Photoelectric:

PE_{Schneiderhohnite}= 41.16 barns/electron
U=PE_{Schneiderhohnite} x rElectron Density= 163.83 barns/cc.

Radioactivity:

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

Schneiderhohnite Classification

Dana Class:

45.01.12.01 (45)Acid and normal Antimonites, Arsenites and Phosphites

(45.01)with miscellaneous formulae

(45.01.12)Dana Group

45.01.12.01 Schneiderhohnite FeFe3As5O13 P1 1

Strunz Class:

04.JA.35 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O

04.JA.35 Schneiderhohnite FeFe3As5O13 P1 1

Other Schneiderhohnite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Schneiderhohnite :
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

Search for Schneiderhohnite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Schneiderhohnite :

Ask about Schneiderhohnite 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 Schneiderhohnite Specimen Label here :

Schneiderhohnite

Fe++Fe+++3As+++5O13
Dana No: 45.01.12.01 Strunz No: 04.JA.35
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.