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Aldermanite Mineral Data

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General Aldermanite Information

Help on Chemical  Formula: Chemical Formula: Mg5Al12(PO4)8(OH)22•32(H2O)
Help on Composition: Composition: Molecular Weight = 2,155.72 gm
   Magnesium    5.64 %  Mg    9.35 % MgO
   Aluminum    15.02 %  Al   28.38 % Al2O3
   Phosphorus  11.49 %  P    26.34 % P2O5
   Hydrogen     4.02 %  H    35.93 % H2O
   Oxygen      63.83 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg5Al12(PO4)8(OH)22•32(H2O)
Help on Environment: Environment: Moculata P deposit with fluellite.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Angaston, 60 km NE of Adelaide, Australia, SA, Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Arthur Richard Alderman (1901-1980), Mineralogist and petrologist, University of Adelaide, SA, Australia.
Help on Name Pronunciation: Name Pronunciation: Aldermanite + Pronunciation Say ALDERMANITE

Aldermanite Image

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  Aldermanite   Minyulite

Comments: White, blocky aldermanite crystals to 2mm completely covering one face of matrix with colorless prismatic Minyulite crystals in sprays to 3mm.
Location: Tom's Phosphate quarry, Kapunda, South Australia, Australia. Scale: Overall: 2 x 1.5 x 2 cm.
© Tom Loomis / Dakota Matrix

Aldermanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.8007:1:3.1932
Help on Cell Dimensions: Cell Dimensions: a = 15, b = 8.33, c = 26.6, Z = 2; V = 3,323.67 Den(Calc)= 2.15
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 13.4(1), 7.98(0.8), 5.55(0.6),

Physical Properties of Aldermanite

Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Flakes - Flat, thin crystals or aggregates.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Aldermanite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2326,KC= 0.2478
Ncalc = 1.53
Help on Optical Data: Optical Data: Biaxial (?), a=1.5

Calculated Properties of Aldermanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.21 gm/cc
note: Specific Gravity of Aldermanite =2.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0059497194
Boson Index = 0.9940502806
Help on Photoelectric: Photoelectric: PEAldermanite = 1.20 barns/electron
U=PEAldermanite x rElectron Density= 2.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aldermanite is Not Radioactive

Aldermanite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.13)Dana Type
  (42.13.01)Dana Group Aldermanite Mg5Al12(PO4)8(OH)22•32(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 08.DE.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DE -With only medium-sized cations, (OH, etc.):RO4 = 3:1
08.DE.35 Aldermanite Mg5Al12(PO4)8(OH)22•32(H2O) Unk Ortho
08.DE.35 Alumoakermanite! (Ca,Na)2(Al,Mg,Fe)(Si2O7) P 421m 4 2m

Other Aldermanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Aldermanite :
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.DE.35





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