Weilerite Mineral Data

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General Weilerite Information

Chemical Formula:

BaAl3H[(As,P)O4]2(OH)6

Composition:

Molecular Weight = 577.19 gm

Barium 23.79 % Ba 26.56 % BaO

Aluminum 14.02 % Al 26.50 % Al₂O₃

Arsenic 19.47 % As 29.87 % As₂O₅

Phosphorus 2.68 % P 6.15 % P₂O₅

Hydrogen 1.22 % H 10.92 % H₂O

Oxygen 38.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaAl₃H(AsO₄)_1.5(PO₄)_0.5(OH)₆

Environment:

Redefined in 1987.

IMA Status:

Approved IMA 1961

Locality:

Weiler and Neubulach, Black Forest, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Weilerite Crystallography

Axial Ratios:

a:c = 1:2.44444

Cell Dimensions:

a = 7.11, c = 17.38, Z = 3; V = 760.89 Den(Calc)= 3.78

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): 3.01(1), 5.8(0.8), 3.54(0.7),

Physical Properties of Weilerite

Color:

White.

Diaphaneity:

Transparent to Translucent

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Weilerite

Gladstone-Dale:

CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1833,KC= 0.1856
Ncalc = 1.7

Optical Data:

Uniaxial (-), e=1.688, w=1.698, bire=0.0100.

Calculated Properties of Weilerite

Electron Density:

Bulk Density (Electron Density)=3.55 gm/cc
note: Specific Gravity of Weilerite =3.78 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Weilerite= 115.58 barns/electron
U=PE_Weilerite x rElectron Density= 410.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Weilerite is Not Radioactive

Weilerite Classification

Dana Class:

43.04.01.09 (43)Compound Phosphates, etc.

(43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)

(43.04.01)Beudantite Group

43.04.01.01 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.02 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

43.04.01.03 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.04 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

43.04.01.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.06 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.07 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.08 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.09 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m

43.04.01.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

Strunz Class:

08.BL.05 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.05 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

08.BL.05 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

08.BL.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

08.BL.05 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m

08.BL.05 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

Other Weilerite 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 Weilerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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Weilerite

BaAl3H[(As,P)O4]2(OH)6
Dana No: 43.04.01.09 Strunz No: 08.BL.05
Locality:

Notes: