Aldermanite Mineral Data

Advertisment

Our Mission is Simple: RMS will be the go-to portal for all mineral, gem and rock shows in the USA

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

General Aldermanite Information

Chemical Formula:

Mg5Al12(PO4)8(OH)22•32(H2O)

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

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

Aldermanite Image

Images:

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

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:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 13.4(1), 7.98(0.8), 5.55(0.6),

Physical Properties of Aldermanite

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

Optical Properties of Aldermanite

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

Calculated Properties of Aldermanite

Electron Density:

Bulk Density (Electron Density)=2.21 gm/cc
note: Specific Gravity of Aldermanite =2.15 gm/cc.

Fermion Index:

Fermion Index = 0.0059497194
Boson Index = 0.9940502806

Photoelectric:

PE_Aldermanite= 1.20 barns/electron
U=PE_Aldermanite x rElectron Density= 2.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aldermanite is Not Radioactive

Aldermanite Classification

Dana Class:

42.13.01.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.13)Dana Type

(42.13.01)Dana Group

42.13.01.01 Aldermanite Mg5Al12(PO4)8(OH)22•32(H2O) Unk Ortho

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

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

Search for Aldermanite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Aldermanite :

Dakota Matrix Minerals Google Search for Aldermanite
Excalibur Mineral Corp. Google Search for Aldermanite
John Betts Fine Minerals Search for Aldermanite
McDougall Minerals Google Search for Aldermanite
Mineral News Website Link
Rock and Mineral Shows Google Search for Aldermanite
Weinrich Minerals, Inc. Google Search for Aldermanite

Ask about Aldermanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Aldermanite Specimen Label here :

Aldermanite

Mg5Al12(PO4)8(OH)22•32(H2O)
Dana No: 42.13.01.01 Strunz No: 08.DE.35
Locality:

Notes: