Albite Mineral Data

Albite Mineral Data
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General Albite Information

Help on Chemical Formula: Chemical Formula: NaAlSi3O8
Help on Composition: Composition: Molecular Weight = 263.02 gm
   Sodium     8.30 %  Na   11.19 % Na2O
   Calcium    0.76 %  Ca    1.07 % CaO
   Aluminum  10.77 %  Al   20.35 % Al2O3
   Silicon   31.50 %  Si   67.39 % SiO2
   Oxygen    48.66 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.95Ca0.05Al1.05Si2.95O8
Help on Environment: Environment: Magmatic and pegmatitic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1815
Help on Locality: Locality: Finnbo, Falun, Dalarna, Sweden. Bourg d'Oisans and Isere, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Latin, albus, in allusion to the common color.
Help on Name Pronunciation: Name Pronunciation: Albite Say ALBITE
Help on Synonym: Synonym: Ab100
  An0
  Clevelandite
 

Albite Image

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Albite   Plagioclase

Comments: Colorless, lustrous blocky albite crystals to 3 cm in size with a thick dusting of micaceous green micro chlorite.
Location: Acushnet Quarry, Bristol Co., Massachussetts, USA. Scale: 17 x 15 x 7.5 cm matrix.
© Dan Weinrich
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Albite   Plagioclase

Comments: Crystal group of bladed albite (variety cleavelandite) crystals.
Location: Taquaral, Minas Gerais, Brazil. Scale: 7.4 x 5 cm.
© John Veevaert
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Albite   Schorl

Comments: Several jet-black lustrous crystals of schorl perched on a white albite matrix.
Location: Shengus, Gilgit, Pakistan. Scale: 4 x 3 x 2 cm.
© Isaias Casanova / IC Minerals

Albite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6368:1:0.5599
Help on Cell Dimensions: Cell Dimensions: a = 8.144, b = 12.787, c = 7.16, Z = 4; alpha = 94.266°, beta = 116.583°, gamma = 87.667° V = 664.40 Den(Calc)= 2.63
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: C1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.176(1), 3.211(0.3), 3.752(0.3),
Help on Forms: Forms:

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Forms: ( 0 0 1) ( 1 0 0) ( 1 0 1) ( 0 1 0)

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Click Here for Large Albite Structure Window Crystal Structure:

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Prewitt C T , Sueno S , Papike J J , American Mineralogist , 61 (1976) p.1213-1225, The crystal structures of high albite and monalbite at high temperatures, T = 24 deg C, feldspar

View Additional jPOWD Structure files for Albite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [4] [40] [41] [42] [43] [44] [45] [46] [5] [6] [7] [8] [9]
 

Physical Properties of Albite

Help on Cleavage: Cleavage: {001} Perfect, {010} Good
Help on Color: Color: White, Gray, Greenish gray, Bluish green, Gray.
Help on Density: Density: 2.61 - 2.63, Average = 2.62
Help on Diaphaneity: Diaphaneity: Transparent to translucent to subtranslucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 7 - Quartz
Help on Luminescence: Luminescence: Fluorescent, Short UV=herry-red blue, Long UV=white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Albite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2034,KPDmeas= 0.2042,KC= 0.2058
Ncalc = 1.54
Help on Optical Data: Optical Data: Biaxial (+), a=1.528-1.533, b=1.5317-1.53685, g=1.538-1.542, bire=0.0090-0.0100, 2V(Calc)=76-82, 2V(Meas)=45. Dispersion relatively weak.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
 

Calculated Properties of Albite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Albite =2.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEAlbite = 1.75 barns/electron
U=PEAlbite x rElectron Density= 4.55 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Albite is Not Radioactive
 

Albite Classification
Help on Dana Class: Dana Class: 76.01.03.01 (76)Tectosilicate Al-Si Framework
  (76.01)with Al-Si frameworks
  (76.01.03)Plagioclase series
 
76.01.03.00 Plagioclase* (Na,Ca)(Si,Al)4O8 C1 1
 
76.01.03.01 Albite NaAlSi3O8 C1 1
 
76.01.03.02 Oligoclase (Na,Ca)(Si,Al)4O8 C1 1
 
76.01.03.03 Andesine* (Na,Ca)(Si,Al)4O8 C1 1
 
76.01.03.04 Labradorite* (Ca,Na)(Si,Al)4O8 C1 1
 
76.01.03.05 Bytownite* (Ca,Na)(Si,Al)4O8 C1 1
 
76.01.03.06 Anorthite CaAl2Si2O8 P1,I1 1
Help on Strunz Class: Strunz Class: 09.FA.35 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
 
09.FA.35 Albite NaAlSi3O8 C1 1
 
09.FA.35 Bytownite* (Ca,Na)(Si,Al)4O8 C1 1
 
09.FA.35 Anorthite CaAl2Si2O8 P1,I1 1
 
09.FA.35 Andesine* (Na,Ca)(Si,Al)4O8 C1 1
 
09.FA.35 Labradorite* (Ca,Na)(Si,Al)4O8 C1 1
 
09.FA.35 Oligoclase (Na,Ca)(Si,Al)4O8 C1 1
 
09.FA.35 Reedmergnerite NaBSi3O8 C1 1
 
09.FA.35 Plagioclase* (Na,Ca)(Si,Al)4O8 C1 1
 

Other Albite Information
Help on See Also: See Also: Links to other databases for Albite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - HyperPhysics
16 - MinDAT
17 - Mineral and Gemstone Kingdom
18 - Mineralienatlas (Deutsch)
19 - Online Mineral Museum
20 - Philatelic Mineralogy
21 - QUT Mineral Atlas
22 - Ruff.Info
23 - Scandinavian mineral gallery
24 - UCLA - Petrography Thin-Sections
25 - WWW-MINCRYST

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Ask about Albite 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 Albite Specimen Label here :

Albite

NaAlSi3O8
Dana No: 76.01.03.01 Strunz No: 09.FA.35
Locality:

 

Notes: