| |
 |
Feinglosite Mineral Data
|
|
|
General Feinglosite Information
|
 Chemical Formula: |
Pb2(Zn,Fe)[(As,S)O4]2•(H2O) |
| Composition: |
Molecular Weight = 751.83 gm |
| |
Zinc 6.52 % Zn 8.12 % ZnO |
| |
Iron 1.86 % Fe 2.39 % FeO |
| |
Arsenic 14.95 % As 22.93 % As2O5 |
| |
Hydrogen 0.27 % H 2.40 % H2O |
| |
Lead 55.12 % Pb 59.37 % PbO |
| |
Sulfur 2.13 % S 5.32 % SO3 |
| |
Oxygen 19.15 % O |
| |
______ ______ |
| |
100.00 % 100.53 % = TOTAL OXIDE |
| Empirical Formula: |
Pb2Zn0.75Fe2+0.25(AsO4)1.5(SO4)0.5•(H2O) |
| Environment: |
The Zn-dominant analogue of arsenbrackebuschite. |
| IMA Status: |
Approved IMA 1995 (Dana # Added) |
| Locality: |
Tsumeb mine, Tsumeb, Namibia. Link to MinDat.org Location Data. |
| Name Origin: |
Named after Mark N. Feinglos (b. 1948), Professor at the Duke University Medical Center, Durham, North Carolina, U.S.A., who discovered the mineral. |
| Name Pronunciation: |
Feinglosite + Pronunciation  |
| Synonym: |
IMA1995-013 |
| |
Feinglosite Image |
|
Images:
|
|
Feinglosite
Comments: Feinglositc in polished section: (a) PPL light and (b) XPL light. In (a) note the inclusions of goethite (white) in the grey feinglosite (the black areas are holes). In (b) note the white to gray clusters of feinglosite. Black areas are goethite.
Location: Lining a cavity in a sample of massive chalcocite from Tsumeb, Namibia. (MinMag, v61:405).
Scale: Picture Width 1 mm.
© Mineralogical Magazine |
|
Feinglosite Crystallography
|
| Axial Ratios: |
a:b:c =1.5068:1:1.3041 |
| Cell Dimensions: |
a = 8.973, b = 5.955, c = 7.766, Z = 2; beta = 112.2° V = 384.21 Den(Calc)= 6.50 |
| Crystal System: |
Monoclinic Space Group: P 21,P 21/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.246(1), 2.769(0.6), 2.988(0.6), |
| |
Physical Properties of Feinglosite
|
| Color: |
Pale olive green. |
| Density: |
6.52 |
| Diaphaneity: |
Transparent |
| Hardness: |
4-5 - Fluorite-Apatite |
| Luster: |
Adamantine |
| Streak: |
white |
| |
Optical Properties of Feinglosite
|
| Optical Data: |
Biaxial (?) |
| |
NCalc= 1.98 - from Gladstone-Dale relationship (KC = 0.151) where Ncalc=Dcalc*KC+1
NCalc= 1.98 - from Gladstone-Dale relationship (KC = 0.151) where Ncalc=Dmeas*KC+1 |
| RL Bireflectance: |
Very weak. |
| RL Color: |
Very pale brownish gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Feinglosite in Air
| λ |
R1 |
R2 |
 |
∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
12.20 |
12.30 |
|
|
|
| 420 nm |
11.80 |
12.00 |
|
| 440 nm |
11.60 |
11.80 |
|
| 460 nm |
11.40 |
11.60 |
|
| 480 nm |
11.20 |
11.40 |
|
| 500 nm |
11.10 |
11.20 |
|
| 520 nm |
10.90 |
11.10 |
|
| 540 nm |
10.80 |
11.00 |
|
| 560 nm |
10.80 |
10.90 |
|
| 580 nm |
10.70 |
10.80 |
|
| 600 nm |
10.70 |
10.80 |
|
| 620 nm |
10.70 |
10.80 |
|
| 640 nm |
10.70 |
10.80 |
|
| 660 nm |
10.70 |
10.80 |
|
| 680 nm |
10.70 |
10.80 |
|
| 700 nm |
10.60 |
10.70 |
|
Calculated Relative Intensity Colors of Feinglosite in Air
Relative
Intensity |
0% |
90% |
100% |
180% |
270% |
360% |
450% |
540% |
630% |
720% |
810% |
| R1 |
|
|
|
|
|
|
|
|
|
|
|
| R2 |
|
|
|
|
|
|
|
|
|
|
|
|
| |
Calculated Properties of Feinglosite
|
| Electron Density: |
Bulk Density (Electron Density)=5.61 gm/cc
note: Specific Gravity of Feinglosite =6.50 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.12
Boson Index = 0.88 |
| Photoelectric: |
PEFeinglosite = 995.79 barns/electron
U=PEFeinglosite x rElectron Density=5,587.34 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Feinglosite is Not Radioactive |
| |
Feinglosite Classification
|
| Dana Class: |
40.02.08.03 (40)Hydrated Phosphates, etc |
| |
(40.02)where A++ (B++)2 (XO4) � x(H2O) |
| |
(40.02.08)Brackebushite Group |
| |
40.02.08.01 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 21/m 2/m |
| |
40.02.08.02 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2•(H2O) P 21/m 2/m |
| |
40.02.08.03 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2•(H2O) P 21,P 21/m Mono |
| |
40.02.08.04 Calderonite! Pb2Fe(VO4)2(OH) P 21/m 2/m |
| |
40.02.08.05 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 21/m 2/m |
| Strunz Class: |
08.BG.05 08 - PHOSPHATES, ARSENATES, VANADATES |
| |
08.B - Phosphates, etc. with Additional Anions, without H2O |
| |
08.BG -With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1 |
| |
08.BG.05 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2•(H2O) P 21/m 2/m |
| |
08.BG.05 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m |
| |
08.BG.05 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 21/m 2/m |
| |
08.BG.05 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 21/m 2/m |
| |
08.BG.05 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2•(H2O) P 21,P 21/m Mono |
| |
08.BG.05 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m |
| |
08.BG.05 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m |
| |
08.BG.05 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m |
| |
08.BG.05 Calderonite! Pb2Fe(VO4)2(OH) P 21/m 2/m |
| |
08.BG.05 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 21/m 2/m |
| |
08.BG.05 Tokyoite! Ba2Mn(VO4)2(OH) P 21/m 2/m |
| |
Other Feinglosite Information
|
| References: |
NAME( CanMin, 8/99) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(AntBidBlaNic4) |
| See Also: |
Links to other databases for Feinglosite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
Search for Feinglosite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Feinglosite :
Ask about Feinglosite 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 Feinglosite Specimen Label here :
|
Feinglosite
Pb2(Zn,Fe)[(As,S)O4]2•(H2O)
Dana No: 40.02.08.03 Strunz No: 08.BG.05
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.