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Aldermanite Mineral Data
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General Aldermanite Information
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 Chemical Formula: |
Mg5Al12(PO4)8(OH)22•32(H2O) |
| Composition: |
Molecular Weight = 2,155.72 gm |
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Magnesium 5.64 % Mg 9.35 % MgO |
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Aluminum 15.02 % Al 28.38 % Al2O3 |
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Phosphorus 11.49 % P 26.34 % P2O5 |
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Hydrogen 4.02 % H 35.93 % H2O |
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Oxygen 63.83 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mg5Al12(PO4)8(OH)22•32(H2O) |
| Environment: |
Moculata P deposit with fluellite. |
| IMA Status: |
Approved IMA 1981 |
| Locality: |
Angaston, 60 km NE of Adelaide, Australia, SA, Link to MinDat.org Location Data. |
| Name Origin: |
Named for Arthur Richard Alderman (1901-1980), Mineralogist and petrologist, University of Adelaide, SA, Australia. |
| Name Pronunciation: |
Aldermanite + Pronunciation  |
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Aldermanite Image |
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Images:
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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 |
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Aldermanite Crystallography
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| Axial Ratios: |
a:b:c =1.8007:1:3.1932 |
| Cell Dimensions: |
a = 15, b = 8.33, c = 26.6, Z = 2; V = 3,323.67 Den(Calc)= 2.15 |
| Crystal System: |
Orthorhombic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 13.4(1), 7.98(0.8), 5.55(0.6), |
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Physical Properties of Aldermanite
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| Color: |
Colorless. |
| Diaphaneity: |
Transparent |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Habit: |
Flakes - Flat, thin crystals or aggregates. |
| Hardness: |
2 - Gypsum |
| Luster: |
Pearly |
| Streak: |
white |
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Optical Properties of Aldermanite
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| Gladstone-Dale: |
CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2326,KC= 0.2478
Ncalc = 1.53 |
| Optical Data: |
Biaxial (?), a=1.5 |
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Calculated Properties of Aldermanite
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| Electron Density: |
Bulk Density (Electron Density)=2.21 gm/cc
note: Specific Gravity of Aldermanite =2.15 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0059497194
Boson Index = 0.9940502806 |
| Photoelectric: |
PEAldermanite = 1.20 barns/electron
U=PEAldermanite x rElectron Density= 2.66 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aldermanite is Not Radioactive |
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Aldermanite Classification
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| Dana Class: |
42.13.01.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.13)Dana Type |
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(42.13.01)Dana Group |
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42.13.01.01 Aldermanite Mg5Al12(PO4)8(OH)22•32(H2O) Unk Ortho |
| Strunz Class: |
08.DE.35 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.D - Phosphates, etc |
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08.DE -With only medium-sized cations, (OH, etc.):RO4 = 3:1 |
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08.DE.35 Aldermanite Mg5Al12(PO4)8(OH)22•32(H2O) Unk Ortho |
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08.DE.35 Alumoakermanite! (Ca,Na)2(Al,Mg,Fe)(Si2O7) P 421m 4 2m |
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Other Aldermanite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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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Print or Cut-and-Paste your Aldermanite Specimen Label here :
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Aldermanite
Mg5Al12(PO4)8(OH)22•32(H2O)
Dana No: 42.13.01.01 Strunz No: 08.DE.35
Locality:
Notes:
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