Philipsbornite Mineral Data

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.

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

Diaphaniety:

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

Optical Data:

Uniaxial (+/-), a=1.79, b=1.79, bire=0.0000.

Calculated Properties of Philipsbornite

Electron Density:

r_electron=4.08 gm/cc
note: r_{Philipsbornite}=4.46 gm/cc.

Fermion Index

Fermion Index = 0.0686
Boson Index = 0.9314

Photoelectric:

PE_{Philipsbornite}= 535.99 barns/electron
U=PE_{Philipsbornite} x r_electron=2,186.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Philipsbornite is Not Radioactive

Philipsbornite Classification

Dana Class:

42.7.4.2 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.7)where (AB)5 (XO4)3 Zq · x(H2O)

(42.7.4)Dana Group

42.7.4.1 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5·(H2O) R 3m 3m

42.7.4.2 Philipsbornite PbAl3(AsO4)2(OH)5·(H2O) R 3m-,R 3m Trig

42.7.4.3 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O) R 3m 3 2/m

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

Strunz Class:

VII/B.36-80 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.36 - Crandallite group

VII/B.36-10 Crandallite CaAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m

VII/B.36-20 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5·(H2O) R 3m 3m

VII/B.36-30 Goyazite SrAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m

VII/B.36-40 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O) R 3m 3 2/m

VII/B.36-50 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 Cm m

VII/B.36-60 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m

VII/B.36-70 Plumbogummite PbAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m

VII/B.36-80 Philipsbornite PbAl3(AsO4)2(OH)5·(H2O) R 3m-,R 3m Trig

VII/B.36-90 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-100 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m

VII/B.36-110 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-120 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m

VII/B.36-125 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m

VII/B.36-130 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-135 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m

VII/B.36-140 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-150 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-150* Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5·(H2O) R 3m 3m

VII/B.36-152 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m

VII/B.36-155 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m

VII/B.36-160 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m

VII/B.36-170 Zairite Bi(Fe,Al)3(PO4)2(OH)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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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

Philipsbornite

PbAl3(AsO4)2(OH)5·(H2O)
Dana No: 42.7.4.2 Strunz No: VII/B.36-80
Locality:

Notes: