Mineralogy Database

Amblygonite Mineral Data

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General Amblygonite Information

Help on Chemical  Formula: Chemical Formula: (Li,Na)Al(PO4)(F,OH)
Help on Composition: Composition: Molecular Weight = 151.41 gm
   Sodium       3.80 %  Na    5.12 % Na2O
   Lithium      3.44 %  Li    7.40 % Li2O
   Aluminum    17.82 %  Al   33.67 % Al2O3
   Phosphorus  20.46 %  P    46.88 % P2O5
   Hydrogen     0.17 %  H     1.49 % H2O
   Oxygen      44.91 %  O
   Fluorine     9.41 %  F     9.41 % F
                 -   %   F    -3.96 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Li0.75Na0.25Al(PO4)F0.75(OH)0.25
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1817
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek amblys - "blunt" and goni - "angle."
Help on Name Pronunciation: Name Pronunciation: Amblygonite + Pronunciation Say AMBLYGONITE
Help on Synonym: Synonym: ICSD 26513
  PDF 22-1138
 

Amblygonite Image

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  Amblygonite

Comments: Grayish, massive amblygonite from the type locality.
Location: Chursdorf, Penig, Chemnitz, Saxony, Germany. Scale: Specimen size 35 mm.
© Thomas Witzke / Abraxas-Verlag

Amblygonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7289:1:0.7078
Help on Cell Dimensions: Cell Dimensions: a = 5.19, b = 7.12, c = 5.04, Z = 2; alpha = 112.033°, beta = 97.816°, gamma = 68.116° V = 158.71 Den(Calc)= 3.17
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.925(1), 3.151(1), 4.64(1),
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Forms: ( 3 3 2) ( 0 1 1) ( 0 1 0) ( 0 2 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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Physical Properties of Amblygonite

Help on Cleavage: Cleavage: {100} Perfect, {110} Good, {011} Distinct
Help on Color: Color: White, Yellow, Gray, Bluish gray, Greenish gray.
Help on Density: Density: 2.98 - 3.11, Average = 3.04
Help on Diaphaneity: Diaphaneity: Transparent to Subtransparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Amblygonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1921,KPDmeas= 0.1981,KC= 0.1974
Ncalc = 1.59 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.58-1.6, b=1.59-1.62, g=1.6-1.63, bire=0.0200-0.0300, 2V(Calc)=68-88, 2V(Meas)=50.
 

Calculated Properties of Amblygonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Amblygonite =3.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0027945113
Boson Index = 0.9972054887
Help on Photoelectric: Photoelectric: PEAmblygonite = 1.64 barns/electron
U=PEAmblygonite x rElectron Density= 4.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Amblygonite is Not Radioactive
 

Amblygonite Classification

Help on  Dana Class: Dana Class: 41.05.08.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.08)Amblygonite Group
 
41.05.08.01 Amblygonite (Li,Na)Al(PO4)(F,OH) P1 1
 
41.05.08.02 Montebrasite? LiAl(PO4)(OH,F) P1 1
 
41.05.08.03 Natromontebrasite? (Na,Li)Al(PO4)(OH,F) P1 1
Help on  Strunz Class: Strunz Class: 08.BB.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
 
08.BB.05 Amblygonite (Li,Na)Al(PO4)(F,OH) P1 1
 
08.BB.05 Natromontebrasite? (Na,Li)Al(PO4)(OH,F) P1 1
 
08.BB.05 Montebrasite? LiAl(PO4)(OH,F) P1 1
 
08.BB.05 Tavorite LiFe(PO4)(OH) P1 or P1 Tri
 

Other Amblygonite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Amblygonite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - Tradeshop.com - The Rainbow of Gems
18 - WWW-MINCRYST

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Amblygonite

(Li,Na)Al(PO4)(F,OH)
Dana No: 41.05.08.01 Strunz No: 08.BB.05
Locality:

 

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