Philipsbornite Mineral Data
General Philipsbornite Information
Chemical Formula:
PbAl3(AsO4)2(OH)5•(H2O)
Composition:
Molecular Weight = 669.04 gm
Aluminum 12.10 % Al 22.86 % Al2 O3
Arsenic 22.40 % As 34.35 % As2 O5
Hydrogen 1.05 % H 9.42 % H2 O
Lead 30.97 % Pb 33.36 % PbO
Oxygen 33.48 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
PbAl3 (AsO4 )2 (OH)5 •(H2 O)
Environment:
Associated with crocoite.
IMA Status:
Approved IMA 1982
Locality:
Dundas district, TAS, Australia. Link to MinDat.org Location Data.
Name Origin:
Named for Helut von Philipsborn (1892-1983), Mineralogist, University of Bonn, Germany.
Name Pronunciation:
Philipsbornite + Pronunciation
Philipsbornite Image
Images:
Philipsbornite Crystallography
Axial Ratios:
a:c = 1:2.39803
Cell Dimensions:
a = 7.11, c = 17.05, Z = 3; V = 746.44 Den(Calc)= 4.46
Crystal System:
Trigonal Space Group: R 3m-,R 3m
X Ray Diffraction:
By Intensity(I/Io ): 3.02(1), 5.82(0.9), 3.56(0.8),
Physical Properties of Philipsbornite
Cleavage:
None
Color:
Colorless, Gray green.
Density:
4.33
Diaphaneity:
Transparent
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous (Glassy)
Optical Properties of Philipsbornite
Gladstone-Dale:
CI meas = -0.017 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = 0.013 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1771,KPDmeas = 0.1824,KC = 0.1794 Ncalc = 1.78 - 1.8
Optical Data:
Uniaxial (+/-), a=1.79, b=1.79, bire=0.0000.
Calculated Properties of Philipsbornite
Electron Density:
Bulk Density (Electron Density)=4.08 gm/cc note: Specific Gravity of Philipsbornite =4.46 gm/cc.
Fermion Index:
Fermion Index = 0.06 Boson Index = 0.94
Photoelectric:
PEPhilipsbornite = 535.99 barns/electronU=PEPhilipsbornite x r Electron Density=2,186.73 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Philipsbornite is Not Radioactive
Philipsbornite Classification
Dana Class:
42.07.04.02 (42) Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.07) where (AB)5 (XO4)3 Zq � x(H2O)
(42.07.04) Arsenocrandallite Group
42.07.04.01 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m
42.07.04.02 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig
42.07.04.03 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3 m 3 2/m
42.07.04.04 Segnitite PbFe3H(AsO4)2(OH)6 R 3 m 3 2/m
Strunz Class:
08.BL.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.B - Phosphates, etc. with Additional Anions, without H2O
08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
08.BL.10 Arsenogorceixite ! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3 m 3 2/m
08.BL.10 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m
08.BL.10 Ferrazite ? (Pb,Ba)3(PO4)2•8(H2O)(?) Tri
08.BL.10 Arsenowaylandite * BiAl3(AsO4)2(OH)6 R 3 m 3 2/m
08.BL.10 Benauite ! HSrFe3(PO4)2(OH)6 R 3 m 3 2/m
08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3 m 3 2/m
08.BL.10 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
08.BL.10 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3 m 3 2/m
08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3 m 3 2/m
08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3 m 3 2/m
08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3 m 3 2/m
08.BL.10 Lusungite ? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
08.BL.10 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig
08.BL.10 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3 m 3 2/m
08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3 m 3 2/m
08.BL.10 Springcreekite ! BaV3(PO4)2(OH,H2O)6 R 3 m 3 2/m
Other Philipsbornite Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Philipsbornite :
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
Search for Philipsbornite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Philipsbornite :
Ask about Philipsbornite 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
Espa�ol
Print or Cut-and-Paste your Philipsbornite Specimen Label here :
Philipsbornite
PbAl3(AsO4)2(OH)5•(H2O)
Dana No: 42.07.04.02 Strunz No: 08.BL.10
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.