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Gatehouseite

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Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australia
© M. Burkhardt

Show Gatehouseite Photos (5)
Formula:
Mn
2+
5
[(OH)
 
2
|PO
 
4
]
 
2
System:OrthorhombicLustre:Adamantine
Hardness:4
This page provides mineralogical data about Gatehouseite.

Classification of Gatehouseite

IMA status:Approved 1992
Strunz 8th edition ID:7/B.11-65
Nickel-Strunz 10th (pending) edition ID:8.BD.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
Dana 8th edition ID:41.4.1.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq
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Type Occurrence of Gatehouseite

Type Locality:Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australia
Year of Discovery:1993

Physical Properties of Gatehouseite

Lustre:Adamantine
Hardness (Mohs):4

Crystallography of Gatehouseite

Crystal System:Orthorhombic
Cell Parameters:a = 9.09Å, b = 5.69Å, c = 18Å
Ratio:a:b:c = 1.598 : 1 : 3.163
Unit Cell Volume:V 931.00 ų (Calculated from Unit Cell)

Optical Data of Gatehouseite

Type:Biaxial (+/-)
RI values: nα = 1.740 nβ = 1.750 nγ = 1.760
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v moderate

Chemical Properties of Gatehouseite

Formula:
Mn
2+
5
[(OH)
 
2
|PO
 
4
]
 
2
Essential elements:H, Mn, O, P
All elements listed in formula:H, Mn, O, P
Common Impurities:Fe,Cu,Zn,Pb,Al,V,As,H2O

Relationship of Gatehouseite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BD.05Cornwallite
Cu
 
5
[(OH)
 
2
|AsO
 
4
]
 
2
8.BD.05Pseudomalachite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
8.BD.05Reichenbachite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
8.BD.10Arsenoclasite
Mn
2+
5
[(OH)
 
2
|AsO
 
4
]
 
2
8.BD.15Parwelite
Mn
 
10
Sb
 
2
As
 
2
Si
 
2
O
 
24
8.BD.20Reppiaite
Mn
2+
5
[(OH)
 
2
|VO
 
4
]
 
2
8.BD.25Ludjibaite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
8.BD.30Cornubite
Cu
 
5
[(OH)
 
2
|AsO
 
4
]
 
2

Other Names for Gatehouseite

Synonyms:
GatehousiteIMA1992-016
Other Languages:
German:Gatehouseit
Gatehousit
Russian:Гейтхаузит
Spanish:Gatehouseita
Gatehousita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Gatehouseite

Reference List:New Minerals (1997), New Minerals 1990-1994.

Mineralogical Magazine: 57: 309-313.

Inorganic Chemistry: 16: 2417-2422.

Internet Links for Gatehouseite

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    Localities for Gatehouseite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • South Australia
      • Eyre peninsula
        • Middleback Range
          • Iron Knob
    		Min.Mag.(1993) 57, 309-313; NM 90-94 (1997); HB4 (2000)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Oct 2009 19:34:44