Philipsbornite Mineral Data

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General Philipsbornite Information

Chemical Formula:

PbAl3(AsO4)2(OH)5•(H2O)

Composition:

Molecular Weight = 669.04 gm

Aluminum 12.10 % Al 22.86 % Al₂O₃

Arsenic 22.40 % As 34.35 % As₂O₅

Hydrogen 1.05 % H 9.42 % H₂O

Lead 30.97 % Pb 33.36 % PbO

Oxygen 33.48 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbAl₃(AsO₄)₂(OH)₅•(H₂O)

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

Comments: Greenish-yellow philipsbornite botryoidal crust.
Location: Dundas, Tasmania, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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:

TrigonalSpace Group: R 3m-,R 3m

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

By Intensity(I/I_o): 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:

PE_{Philipsbornite}= 535.99 barns/electron
U=PE_{Philipsbornite} x rElectron 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 3m 3 2/m

42.07.04.04 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 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 3m 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 3m 3 2/m

08.BL.10 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3m 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 3m 3 2/m

08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m

08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 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 3m 3 2/m

08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m

08.BL.10 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Philipsbornite

PbAl3(AsO4)2(OH)5•(H2O)
Dana No: 42.07.04.02 Strunz No: 08.BL.10
Locality:

Notes: