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Aldermanite

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Tom's Phosphate quarry, Kapunda, South Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia
© J.Ralph

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Formula:
Mg
 
5
Al
 
12
[(OH)
 
11
|(PO
 
4
)
 
4
]
 
2
 · 32H
 
2
O
System:OrthorhombicColour:Colourless
Lustre:PearlyHardness:1 - 2
Name:Named after A. R. Alderman
This page provides mineralogical data about Aldermanite.

Classification of Aldermanite

IMA status:Approved 1980
Strunz 8th edition ID:7/D.17-10
Nickel-Strunz 10th (pending) edition ID:8.DE.35

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
E : With only medium-sized cations, (OH, etc.):RO4 = 3:1
Dana 8th edition ID:42.13.1.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
Hey's CIM Ref.:19.8.10

19 : Phosphates
8 : Phosphates of Al and other metals
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Type Occurrence of Aldermanite

Type Locality:Moculta Phosphate Quarry (Klemm's Quarry), Angaston, Barossa Valley, South Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia
Year of Discovery:1981

Physical Properties of Aldermanite

Lustre:Pearly
Colour:Colourless
Streak:White
Hardness (Mohs):1 - 2

Crystallography of Aldermanite

Crystal System:Orthorhombic
Cell Parameters:a = 15Å, b = 8.33Å, c = 26.6Å
Ratio:a:b:c = 1.801 : 1 : 3.193
Unit Cell Volume:V 3,323.67 ų (Calculated from Unit Cell)

Optical Data of Aldermanite

Type:Biaxial
RI values: nα = 1.500
Maximum Birefringence:δ = 1.500

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively weak

Chemical Properties of Aldermanite

Formula:
Mg
 
5
Al
 
12
[(OH)
 
11
|(PO
 
4
)
 
4
]
 
2
 · 32H
 
2
O
Essential elements:Al, H, Mg, O, P
All elements listed in formula:Al, H, Mg, O, P

Relationship of Aldermanite to other Species

Related Minerals - Nickel-Strunz Grouping):
8.DE.05Senegalite
Al
 
2
[(OH)
 
3
|PO
 
4
] · H
 
2
O
8.DE.10Fluellite
Al
 
2
[F
 
2
|OH|PO
 
4
] · 7H
 
2
O
8.DE.15Bulachite
Al
 
2
[(OH)
 
3
|AsO
 
4
] · 3H
 
2
O
8.DE.20Zapatalite
Cu
 
3
Al
 
4
[(OH)
 
3
|PO
 
4
]
 
3
 · 4H
 
2
O
8.DE.25Ceruleite
Cu
 
2
Al
 
7
[(OH)
 
13
|(AsO
 
4
)
 
4
] · 11.5H
 
2
O
8.DE.40Juanitaite
Bi(Cu,Ca,Fe)
 
10
[(OH)
 
11
|(AsO
 
4
)
 
4
] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:
19.8.1Montebrasite
LiAl[(OH,F)|PO
 
4
]
19.8.2Brazilianite
NaAl
 
3
[(OH)
 
2
|PO
 
4
]
 
2
19.8.3Wardite
NaAl
 
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 2H
 
2
O
19.8.4Tancoite
LiNa
 
2
Al[OH|HPO
 
4
|PO
 
4
]
19.8.5Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
[(OH,F)|PO
 
4
]
 
4
19.8.6Tinsleyite
KAl
 
2
[OH|(PO
 
4
)
 
2
] · 2H
 
2
O
19.8.7Taranakite
(K,NH
 
4
)Al
 
3
(PO
 
4
)
 
3
OH·9H
 
2
O
19.8.8Francoanellite
K
 
3
Al
 
5
[(HPO
 
4
)
 
3
|PO
 
4
]
 
2
 · 12H
 
2
O
19.8.9Gordonite
MgAl
 
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.8.11Overite
CaMgAl[OH|(PO
 
4
)
 
2
] · 4H
 
2
O
19.8.12Montgomeryite
Ca
 
4
MgAl
 
4
[(OH)
 
2
|(PO
 
4
)
 
3
]
 
2
 · 12H
 
2
O
19.8.14Foggite
CaAl[(OH)
 
2
|PO
 
4
] · H
 
2
O
19.8.15Gatumbaite
CaAl
 
2
[OH|PO
 
4
]
 
2
 · H
 
2
O
19.8.16Crandallite
CaAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
19.8.17Matulaite
CaAl
 
18
[(OH)
 
5
|(PO
 
4
)
 
3
]
 
4
 · 28H
 
2
O
19.8.19Lehiite
19.8.20Millisite
(Na,K)CaAl
 
6
[(OH)
 
9
|(PO
 
4
)
 
4
] · 3H
 
2
O
19.8.21Englishite
K
 
3
Na
 
2
Ca
 
10
Al
 
15
[OH|(PO
 
4
)
 
3
]
 
7
 · 26H
 
2
O
19.8.22Kleemanite
ZnAl
 
2
[OH|PO
 
4
]
 
2
 · 3H
 
2
O
19.8.23Mantienneite
KMg
 
2
Al
 
2
Ti[(OH)
 
3
|(PO
 
4
)
 
4
] · 15H
 
2
O
19.8.24Paulkerrite
K(Mg,Mn
2+
 
)
 
2
(Fe
3+
 
,Al,Ti,Mg)
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
 · 15H
 
2
O

Other Names for Aldermanite

Synonyms:
IMA1980-044
German names:
Aldermanit
Spanish names:
Aldermanita

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 Aldermanite

Reference List:American Mineralogist: 66: 1099.

Mineralogical Magazine: 44: 59-62.

Internet Links for Aldermanite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Aldermanite in the Natural History Museum (London) online catalogue
  • Aldermanite details from Handbook of Mineralogy (PDF)
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    Localities for Aldermanite

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    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.
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    (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
      • Mt Lofty Ranges
        • South Mt Lofty Ranges
          • Barossa Valley
            • Angaston
    		Segnit, E. R., Watts, J. A. & Peisley, V. (1981): Mineralogy of the rock phosphate deposit at Moculta, South Australia. Austral. Mineral. 1 (35), 179-186; [Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]
    S. Mills (in prep)
          • Kapunda
    		www.excaliburmineral.com/mina-c.htm
    Mineral and/or Locality
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