Woodhouseite Mineral Data

Woodhouseite Mineral Data +

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General Woodhouseite Information

Chemical Formula:

CaAl3(PO4)(SO4)(OH)6

Composition:

Molecular Weight = 414.10 gm

Calcium 9.68 % Ca 13.54 % CaO

Aluminum 19.55 % Al 36.93 % Al₂O₃

Phosphorus 7.48 % P 17.14 % P₂O₅

Hydrogen 1.46 % H 13.05 % H₂O

Sulfur 7.74 % S 19.33 % SO₃

Oxygen 54.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaAl₃(PO₄)(SO₄)(OH)₆

Environment:

Found in vugs in quartz veins.

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Champion mine, 4 miles WSW of White Mountain Peak, north of Laws, Mono Co., California. Link to MinDat.org Location Data.

Name Origin:

Named for Charles D. Woodhouse (1888-1975), U.S. mineral collector

Synonym:

ICSD 100137

Kehoeite-quartz, gypsum and sphalerite

PDF 37-469

Woodhouseite Image

Images:

Woodhouseite

Comments: Crystals of woodhouseite to 0.5 cm across on an exposed quartz vein.
Location: Champion Mine, Inyo County, California, USA. Scale: Picture size 2 cm.
© John Veevaert

Woodhouseite Crystallography

Axial Ratios:

a:c = 1:2.33691

Cell Dimensions:

a = 6.975, c = 16.3, Z = 3; V = 686.76 Den(Calc)= 3.00

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): 2.94(1), 1.89(0.94), 2.19(0.86),

Forms:

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Forms: [ 0 1 2] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

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Pabst A , American Mineralogist , 32 (1947) p.16-30, Some computations on svanbergite, woodhouseite and alunite

Physical Properties of Woodhouseite

Cleavage:

[0001] Perfect

Color:

Colorless, White, Pink, Pale orange.

Density:

3.012

Diaphaniety:

Transparent to Translucent

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Woodhouseite

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2138,KPDmeas= 0.213,KC= 0.2149

Optical Data:

Uniaxial (+), w=1.636, e=1.647, bire=0.0110.

Calculated Properties of Woodhouseite

Electron Density:

r_electron=3.01 gm/cc
note: r_Woodhouseite=3.00 gm/cc.

Fermion Index

Fermion Index = 0.00097
Boson Index = 0.99903

Photoelectric:

PE_Woodhouseite= 2.61 barns/electron
U=PE_Woodhouseite x r_electron= 7.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Woodhouseite is Not Radioactive

Woodhouseite Classification

Dana Class:

43.4.1.8 (43)Compound Phosphates, etc.

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

(43.4.1)Dana Group

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

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

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

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

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

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

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

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

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

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

Strunz Class:

VII/B.35-20 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.35 - Beudantite group

VII/B.35-10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m

VII/B.35-20 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-30 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-40 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-60 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-65 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

VII/B.35-70 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-75 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

VII/B.35-80 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

VII/B.35-90 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

Other Woodhouseite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Woodhouseite

CaAl3(PO4)(SO4)(OH)6
Dana No: 43.4.1.8 Strunz No: VII/B.35-20
Locality:

Notes: