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Aldermanite

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About AldermaniteHide

Formula:
Mg5Al12(PO4)8(OH)22 · 32H2O
Colour:
Colorless in transmitted light
Lustre:
Sub-Vitreous, Pearly
Hardness:
2
Specific Gravity:
2.1 (Calculated)
Crystal System:
Orthorhombic
Name:
Named by Ian R. Harrowfield, Edgar Ralph Segnit, and John. A. Watts in 1981 in honor of Arthur Richard Alderman (1901–1980), Professor of Geology and Mineralogy, University of Adelaide, Adelaide, Australia.
This page provides mineralogical data about Aldermanite.


Classification of AldermaniteHide

Approved
Approval Year:
1980
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
42.13.1.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
19.8.10

19 : Phosphates
8 : Phosphates of Al and other metals

Physical Properties of AldermaniteHide

Sub-Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
Colorless in transmitted light
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Density:
2.1 g/cm3 (Calculated)

Optical Data of AldermaniteHide

Type:
Biaxial
RI values:
n = 1.500
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak
Pleochroism:
Non-pleochroic

Chemical Properties of AldermaniteHide

Formula:
Mg5Al12(PO4)8(OH)22 · 32H2O

Crystallography of AldermaniteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 15.000 Å, b = 8.330 Å, c = 26.60 Å
Ratio:
a:b:c = 1.801 : 1 : 3.193
Unit Cell V:
3,323.67 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Frequently in talclike flakes and aggregates, to 0.1 mm.; also in clusters of transparent platy crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
13.40 (100)
7.98 (80)
5.70 (30)
5.55 (60)
4.96 (30)
2.841 (50)
2.660 (30)
(

Type Occurrence of AldermaniteHide

Place of Conservation of Type Material:
C.S.I.R.O. Division of Mineral Chemistry, Melbourne, M636; Museum Victoria, Melbourne, Australia, M34778.
Geological Setting of Type Material:
As a secondary mineral in cavities in a brecciated metamorphosed sedimentary phosphate deposit, formed by the alteration of fluellite
Associated Minerals at Type Locality:

Synonyms of AldermaniteHide

Other Language Names for AldermaniteHide

German:Aldermanit
Simplified Chinese:直水磷镁石
Spanish:Aldermanita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Minyulite21 photos of Aldermanite associated with Minyulite on mindat.org.
Fluellite3 photos of Aldermanite associated with Fluellite on mindat.org.
Limonite2 photos of Aldermanite associated with Limonite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DE.05SenegaliteAl2(PO4)(OH)(OH)2 · H2OOrth. mm2
8.DE.10FluelliteAl2(PO4)F2(OH) · 7H2OOrth. mmm (2/m 2/m 2/m) : Fddd
8.DE.15BulachiteAl2(AsO4)(OH)3 · 3H2OOrth.
8.DE.20ZapataliteCu3Al4(PO4)3(OH)9 · 4H2OTet.
8.DE.25CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2OTric.
8.DE.40Juanitaite(Cu,Ca,Fe)10Bi(AsO4)4(OH)11 · 2H2OTet. 4/mmm (4/m 2/m 2/m) : P42/nnm
8.DE.45IangreyiteCa2Al7(PO4)2(PO3OH)2(OH,F)15 · 8H2OTrig. 3 2 : P3 2 1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.8.1MontebrasiteLiAl(PO4)(OH)Tric. 1 : P1
19.8.2BrazilianiteNaAl3(PO4)2(OH)4Mon. 2/m : P2/b
19.8.3WarditeNaAl3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
19.8.4TancoiteLiNa2Al(PO4)(HPO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
19.8.5Bertossaite(Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4Orth.
19.8.6TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
19.8.7Taranakite(K,NH4)Al3(PO4)3(OH) · 9H2OTrig. 3m (3 2/m) : R3c
19.8.8FrancoanelliteK3Al5(PO4)2(HPO4)3 · 12H2OTrig.
19.8.9GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
19.8.11OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
19.8.12MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
19.8.14FoggiteCaAl(PO4)(OH)2 · H2OOrth.
19.8.15GatumbaiteCaAl2(PO4)2(OH)2 · H2OMon. 2/m : P2/m
19.8.16CrandalliteCaAl3(PO4)(PO3OH)(OH)6Trig. 3m (3 2/m) : R3m
19.8.17Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2OMon.
19.8.19LehiiteCaAl3(PO4)(PO3OH)(OH)6
19.8.20Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2OTet.
19.8.21EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
19.8.22KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
19.8.23MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth.
19.8.24PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca

Fluorescence of AldermaniteHide

Not fluorescent.

Other InformationHide

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

References for AldermaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cabri, L.J., Fleischer, M., Pabst, A. (1981) New mineral names. American Mineralogist: 66: 1099-1103.
Harrowfield, I.R., Segnit, E.R., Watts, J.A. (1981) Aldermanite, a new magnesium aluminium phosphate. Mineralogical Magazine: 44: 59-62.

Internet Links for AldermaniteHide

Localities for AldermaniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia (TL)
 
  • South Australia
    • Mt Lofty Ranges
      • North 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. Australian Mineralogist No. 35, 179-186. Clark, 1993 - "Hey's Mineral Index, 3rd Edition".
S. Mills (in prep)
        • Kapunda
www.excaliburmineral.com/mina-c.htm
        • Robertstown
Francis, G.L., Peisley, V., 2012. Minerals from Fairview and St John's phosphate deposits, South Australia. (self published).
Mineral and/or Locality  
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