Mineralogy Database

Gatehouseite Mineral Data

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General Gatehouseite Information

Help on Chemical  Formula: Chemical Formula: Mn++5(PO4)2(OH)4
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Mn2+5(PO4)2(OH)4
Help on Environment: Environment: Secondary mineral in cavities in a sedimentary Fe�Mn deposit, probably formed by reaction of phosphorus-rich fluids with hausmannite at low temperature.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Iron Monarch quarry, Iron Knob, South Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Bryan Michael Kenneth Cummings Gatehouse (1932- ), crystal chemist, Monash University, Melbourne, Australia.
Help on Name Pronunciation: Name Pronunciation: Gatehouseite + Pronunciation Say GATEHOUSEITE
Help on Synonym: Synonym: ICSD 1198
  PDF 47-1822

Gatehouseite Crystallography

Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.9(1), 2.702(0.8), 2.853(0.7),

Physical Properties of Gatehouseite

Help on Color: Color: Yellow, Yellow, Pale orange.

Optical Properties of Gatehouseite

Help on Gladstone-Dale: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Gatehouseite =3.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001741466
Boson Index = 0.9998258534
Help on Photoelectric: Photoelectric: PEGatehouseite = 13.88 barns/electron
U=PEGatehouseite x rElectron Density= 49.71 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gatehouseite is Not Radioactive

Gatehouseite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.04)where (A B)5 (XO4)2 Zq
  (41.04.01)Dana Group Arsenoclasite Mn5(AsO4)2(OH)4 P 212121 2 2 2 Gatehouseite Mn5(PO4)2(OH)4 P 212121 2 2 2
Help on  Strunz Class: 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

Help on See Also: 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

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Dana No: Strunz No: 08.BD.10