Waterhouseite Mineral Data

General Waterhouseite Information

Chemical Formula:

Mn7(PO4)2(OH)8

Composition:

Molecular Weight = 727.16 gm

Manganese 55.00 % Mn 71.02 % MnO

Vanadium 0.28 % V 0.50 % V₂O₅

Arsenic 0.72 % As 1.11 % As₂O₅

Phosphorus 7.71 % P 17.67 % P₂O₅

Hydrogen 1.08 % H 9.67 % H₂O

Oxygen 35.20 % O

______ ______

100.00 % 99.97 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_7.28P_1.81As_0.07V⁵⁺_0.041.92(O₄)(OH)_7.81O_0.51

Environment:

Occurs in cavities in a matrix consisting of hematite, hausmannite, barite, manganoan calcite and rhodochrosite from the 130-meter level on the eastern side of the Iron Monarch mine , a Proterozoic sedimentary iron ore d

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Iron Monarch quarry, Iron Knob, South Australia Link to MinDat.org Location Data.

Name Origin:

Named after Frederick George Waterhouse (1815-1898), first Director of the South Australian Museum (Adelaide) and celebrates the continuing work of the Waterhouse Club,

Synonym:

IMA2004-035

Waterhouseite Crystallography

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

By Intensity(I/I_o): 3.621(1), 4.436(0.7), 3.069(0.5),2.941(0.4), 2.78(0.35), 2.718(0.2), 2.842(0.2), 2.89(0.2),

Physical Properties of Waterhouseite

Color:

Resinous orange brown, Dark clove brown.

Optical Properties of Waterhouseite

Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2004,KPDmeas= 0.2071,KC= 0.2086
Ncalc = 1.74 - 1.77

Calculated Properties of Waterhouseite

Electron Density:

Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Waterhouseite =3.55 gm/cc.

Fermion Index:

Fermion Index = 0.0001776102
Boson Index = 0.9998223898

Photoelectric:

PE_{Waterhouseite}= 15.12 barns/electron
U=PE_{Waterhouseite} x rElectron Density= 51.41 barns/cc.

Radioactivity:

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

Waterhouseite Classification

Dana Class:

41.02.01.03 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.02)where (A B)7 (XO4)2 Zq

(41.02.01)Allactite Group

41.02.01.01 Allactite Mn7(AsO4)2(OH)8 P 2₁/a 2/m

41.02.01.02 Raadeite! Mg7(PO4)2(OH)8 P 2₁/n 2/m

41.02.01.03 Waterhouseite! Mn7(PO4)2(OH)8 P 2₁/c 2/m

Strunz Class:

08.BE.85 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1

08.BE.85 Waterhouseite! Mn7(PO4)2(OH)8 P 2₁/c 2/m

Other Waterhouseite Information

See Also:

Links to other databases for Waterhouseite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Waterhouseite using:

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Ask about Waterhouseite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Waterhouseite

Mn7(PO4)2(OH)8
Dana No: 41.02.01.03 Strunz No: 08.BE.85
Locality:

Notes: