Gatehouseite Mineral Data

General Gatehouseite Information

Chemical Formula:

Mn++5(PO4)2(OH)4

Composition:

Molecular Weight = 532.66 gm

Manganese 51.57 % Mn 66.59 % MnO

Phosphorus 11.63 % P 26.65 % P₂O₅

Hydrogen 0.76 % H 6.76 % H₂O

Oxygen 36.04 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₅(PO₄)₂(OH)₄

Environment:

Secondary mineral in cavities in a sedimentary Fe�Mn deposit, probably formed by reaction of phosphorus-rich fluids with hausmannite at low temperature.

IMA Status:

Approved IMA 1993

Locality:

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

Name Origin:

Named for Bryan Michael Kenneth Cummings Gatehouse (1932- ), crystal chemist, Monash University, Melbourne, Australia.

Name Pronunciation:

Gatehouseite + Pronunciation

Synonym:

ICSD 1198

IMA1992-016

PDF 47-1822

Gatehouseite Crystallography

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

By Intensity(I/I_o): 2.9(1), 2.702(0.8), 2.853(0.7),

Physical Properties of Gatehouseite

Color:

Yellow, Yellow, Pale orange.

Optical Properties of Gatehouseite

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1979,KPDmeas= 0.2005,KC= 0.2029
Ncalc = 1.76 - 1.77

Calculated Properties of Gatehouseite

Electron Density:

Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Gatehouseite =3.74 gm/cc.

Fermion Index:

Fermion Index = 0.0001741466
Boson Index = 0.9998258534

Photoelectric:

PE_Gatehouseite= 13.88 barns/electron
U=PE_Gatehouseite x rElectron Density= 49.71 barns/cc.

Radioactivity:

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

Gatehouseite Classification

Dana Class:

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

(41.04)where (A B)5 (XO4)2 Zq

(41.04.01)Dana Group

41.04.01.01 Arsenoclasite Mn5(AsO4)2(OH)4 P 2₁2₁2₁ 2 2 2

41.04.01.02 Gatehouseite Mn5(PO4)2(OH)4 P 2₁2₁2₁ 2 2 2

Strunz Class:

08.BD.10 08 - PHOSPHATES, ARSENATES, VANADATES

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

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

08.BD.10 Arsenoclasite Mn5(AsO4)2(OH)4 P 2₁2₁2₁ 2 2 2

08.BD.10 Gatehouseite Mn5(PO4)2(OH)4 P 2₁2₁2₁ 2 2 2

Other Gatehouseite Information

See Also:

Links to other databases for Gatehouseite :
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
15 - WWW-MINCRYST

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

Gatehouseite

Mn++5(PO4)2(OH)4
Dana No: 41.04.01.02 Strunz No: 08.BD.10
Locality:

Notes: