Plumbogummite Mineral Data

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General Plumbogummite Information

Help on Chemical Formula: Chemical Formula: PbAl3(PO4)2(OH)5•(H2O)

Help on Composition: Composition: Molecular Weight = 581.14 gm

Aluminum 13.93 % Al 26.32 % Al₂O₃

Phosphorus 10.66 % P 24.43 % P₂O₅

Hydrogen 1.21 % H 10.85 % H₂O

Lead 35.65 % Pb 38.41 % PbO

Oxygen 38.54 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula: PbAl₃(PO₄)₂(OH)₅•(H₂O)

Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832

Help on Locality: Locality: Link to MinDat.org Location Data.

Help on Name Origin: Name Origin: Named after its composition: plumbum - "lead" and gummi - "indian rubber."

Help on Name Pronunciation: Name Pronunciation: Plumbogummite + Pronunciation Say PLUMBOGUMMITE

Help on Synonym: Synonym: Hitchcockite

ICSD 87868

PDF 35-623

Schadeite

Plumbogummite Image

Plumbogummite Mimetite

Comments: White, fuzzy aggregates of plumbogummite covering lime green mimetite (campylite) crystals.
Location: Caldbeck Fells, Cumbria, England. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Plumbogummite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.39156

Help on Cell Dimensions: Cell Dimensions: a = 7.018, c = 16.784, Z = 3; V = 715.90 Den(Calc)= 4.04

Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/I_o): 2.97(1), 5.73(0.8), 3.51(0.6),

Click Here for Large Plumbogummite Structure Window Crystal Structure:

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drag2 - RMB Resize/Rotate
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Help on Above

Kolitsch U , Tiekink E R T , Slade P G , Taylor M R , Pring A , European Journal of Mineralogy , 11 (1999) p.513-520, Hinsdalite and plumbogummite, their atomic arrangements, and disordered lead sites

Physical Properties of Plumbogummite

Help on Cleavage: Cleavage: None

Help on Color: Color: White, Gray, Yellow, Bluish green, Brown.

Help on Density: Density: 4 - 5, Average = 4.5

Help on Diaphaneity: Diaphaneity: Translucent

Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Help on Habit: Habit: Colloform - Forming from a gel or colloidal mass.

Help on Habit: Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).

Help on Hardness: Hardness: 4-5 - Fluorite-Apatite

Help on Luminescence: Luminescence: Non-fluorescent.

Help on Luster: Luster: Greasy (Oily)

Help on Streak: Streak: white

Optical Properties of Plumbogummite

Help on Dichroism (e): Dichroism (e): n.

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.212 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.122 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1644,KPDmeas= 0.1476,KC= 0.1871
Ncalc = 1.75 - 1.94

Help on Optical Data: Optical Data: Uniaxial (+), w=1.653, e=1.675, bire=0.0220.

Calculated Properties of Plumbogummite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Plumbogummite =4.04 gm/cc.

Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93

Help on Photoelectric: Photoelectric: PE_{Plumbogummite}= 590.04 barns/electron
U=PE_{Plumbogummite} x rElectron Density=2,215.00 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Plumbogummite is Not Radioactive

Plumbogummite Classification

Help on Dana Class: Dana Class: 42.07.03.05 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.07)where (AB)5 (XO4)3 Zq ƒL x(H2O)

(42.07.03)Crandallite Group

42.07.03.01 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

42.07.03.02 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m

42.07.03.03 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

42.07.03.04 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m

42.07.03.05 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

42.07.03.06 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m

42.07.03.07 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

42.07.03.08 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m

Help on Strunz Class: 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 Plumbogummite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also: Links to other databases for Plumbogummite :
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

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

Plumbogummite

PbAl3(PO4)2(OH)5•(H2O)
Dana No: 42.07.03.05 Strunz No: 08.BL.10
Locality:

Notes: