Angastonite Mineral Data

Angastonite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.


General Angastonite Information

Help on Chemical Formula: Chemical Formula: CaMgAl2(PO4)2(OH)4?7H2O
Help on Composition: Composition: Molecular Weight = 502.43 gm
   Calcium      7.98 %  Ca   11.16 % CaO
   Magnesium    4.84 %  Mg    8.02 % MgO
   Aluminum    10.74 %  Al   20.29 % Al2O3
   Phosphorus  12.33 %  P    28.25 % P2O5
   Hydrogen     3.61 %  H    32.27 % H2O
   Oxygen      60.50 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMgAl2(PO4)2(OH)4•7(H2O)
Help on Environment: Environment: Penrice marble quarry. Related to the montgomeryite-group.
Help on IMA Status: IMA Status: Approved IMA 2008 (Dana # Added)
Help on Locality: Locality: Angaston, in the Mount Lofty Ranges, 100 km NNE of Adelaide, South Australia, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2008-008
 

Angastonite Image

Click Here for Larger Angastonite Image in a New Browser Window Images:
Click Here for Larger Angastonite Image

Angastonite

Comments: SEM image of platy, striated crystals of angastonite.
Location: Angaston, South Australia. Scale: Unknown.
© Mineralogical Magazine
Click Here for Larger Angastonite Image in a New Browser Window Images:
Click Here for Larger Angastonite Image

Angastonite

Comments: White acicular to short prismatic crystals of angastonite covering a dark matrix.
Location: Penrice quarry, Angaston, South Australia, Australia. Scale: Overall: 5.5 x 3.5 x 2 cm.
© Tom Loomis / Dakota Matrix

Angastonite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4923:1:0.226
Help on Cell Dimensions: Cell Dimensions: a = 13.303, b = 27.02, c = 6.107, Z = 6; alpha = 89.64°, beta = 83.44°, gamma = 80.444° V = 2,150.47 Den(Calc)= 2.33
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 13.38(1), 11.05(0.25), 5.73(0.23),8.01(0.21),
 

Physical Properties of Angastonite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: White.
Help on Density: Density: 2.47
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Angastonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2464,KPDmeas= 0.2324,KC= 0.2429
Ncalc = 1.57 - 1.6
Help on Optical Data: Optical Data: Biaxial (+), a=1.566, b=1.572, g=1.584, bire=0.0180, 2V(Calc)=72, 2V(Meas)=70. Dispersion dispersion not observed.
 

Calculated Properties of Angastonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.39 gm/cc
note: Specific Gravity of Angastonite =2.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0052410621
Boson Index = 0.9947589379
Help on Photoelectric: Photoelectric: PEAngastonite = 2.04 barns/electron
U=PEAngastonite x rElectron Density= 4.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Angastonite is Not Radioactive
 

Angastonite Classification
Help on Dana Class: Dana Class: 42.11.08.05 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq · x(H2O)
  (42.11.08)Montgomeryite group
 
42.11.08.01 Montgomeryite Ca4MgAl4(PO4)6(OH)4•12(H2O) C 2/c 2/m
 
42.11.08.02 Kingsmountite (Ca,Mn)4(Fe,Mn)Al4(PO4)6(OH)4•12(H2O) C 2 2
 
42.11.08.03 Calcioferrite Ca4Fe(Fe,Al)4(PO4)6(OH)4•12(H2O) C 2 2
 
42.11.08.04 Zodacite Ca4MnFe4(PO4)6(OH)4•12(H2O) C 2/c,Cc Mono
 
42.11.08.05 Angastonite! CaMgAl2(PO4)2(OH)4?7H2O P1 1
Help on Strunz Class: Strunz Class: 08.DL.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.DL.25 Angastonite! CaMgAl2(PO4)2(OH)4?7H2O P1 1
 

Other Angastonite Information
Help on References: References: NAME( MinMag, v72:1011) PHYS. PROP.(MinMag, v72:1011) OPTIC PROP.(MinMag, v72:1011)
Help on See Also: See Also: Links to other databases for Angastonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Angastonite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Angastonite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Angastonite Mineral Data :

Ask about Angastonite 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 Espaņol

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

Angastonite

CaMgAl2(PO4)2(OH)4?7H2O
Dana No: 42.11.08.05 Strunz No: 08.DL.25
Locality:

 

Notes: