Anorthoclase Mineral Data

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


Dan Weinrich Auctions
[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!


General Anorthoclase Information

Help on Chemical Formula: Chemical Formula: (Na,K)AlSi3O8
Help on Composition: Composition: Molecular Weight = 266.25 gm
   Potassium   3.67 %  K     4.42 % K2O
   Sodium      6.48 %  Na    8.73 % Na2O
   Aluminum   10.13 %  Al   19.15 % Al2O3
   Silicon    31.65 %  Si   67.70 % SiO2
   Oxygen     48.07 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.75K0.25AlSi3O8
Help on Environment: Environment: In high-temperature sodic volcanic and hypabyssal rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1885
Help on Locality: Locality: Rather abundant worldwide. Some localities for well-characterized material include: on Pantelleria and Ustica Islands, Italy. At Larvik, Norway. From Berkum, North Rhine-Westphalia, Ge Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "oblique" and "fracture," descriptive of the cleavage
Help on Name Pronunciation: Name Pronunciation: Anorthoclase + Pronunciation Say ANORTHOCLASE
Help on Synonym: Synonym: ICSD 31180
  PDF 9-478
  Soda Microcline
 

Anorthoclase Image

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

Anorthoclase

Comments: Two white crystals of anorthoclase (possibly mislabeled and actually anorthite.
Location: Kusukidani, Wakayama Prefecture, Kinki Region, Honshu island, Japan. Scale: 15x14x6 mm.
© John Betts - Fine Minerals

Anorthoclase Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6406:1:0.5546
Help on Cell Dimensions: Cell Dimensions: a = 8.2, b = 12.8, c = 7.1, Z = 4; alpha = 90°, beta = 116°, gamma = 90° V = 669.80 Den(Calc)= 2.64
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): 3.211(1), 3.243(0.9), 4.106(0.16),
Click Here for Large Anorthoclase Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Harlow G E , American Mineralogist , 67 (1982) p.975-996, The anorthoclase structures: The effects of temperature and composition, Grande Calderira, Or = 32.5, T = 23 deg C, feldspar

View Additional jPOWD Structure files for Anorthoclase
[1] [2] [3] [4] [5]
 

Physical Properties of Anorthoclase

Help on Cleavage: Cleavage: {001} Perfect, {010} Good
Help on Color: Color: Colorless, Green, Gray, Gray pink, Yellow.
Help on Density: Density: 2.57 - 2.6, Average = 2.58
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Anorthoclase

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2001,KPDmeas= 0.2043,KC= 0.2057
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.519-1.529, b=1.524-1.534, g=1.527-1.536, bire=0.0070-0.0080, 2V(Calc)=64-74, 2V(Meas)=34-60. Dispersion r > v.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Anorthoclase

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.56 gm/cc
note: Specific Gravity of Anorthoclase =2.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEAnorthoclase = 1.98 barns/electron
U=PEAnorthoclase x relectron= 5.08 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 52.50 (Gamma Ray American Petroleum Institute Units)
Concentration of Anorthoclase per GRapi unit = 1.90 (%)

Estimated Radioactivity from Anorthoclase - barely detectable

 

Anorthoclase Classification
Help on Dana Class: Dana Class: 76.01.01.06 (76)Tectosilicate Al-Si Framework
  (76.01)with Al-Si frameworks
  (76.01.01)K (Na,Ba) feldspars
 
76.01.01.01 Orthoclase KAlSi3O8 C 2/m 2/m
 
76.01.01.02 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m
 
76.01.01.03 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m
 
76.01.01.04 Celsian BaAl2Si2O8 I21/c 2/m
 
76.01.01.05 Microcline KAlSi3O8 C1 1
 
76.01.01.06 Anorthoclase (Na,K)AlSi3O8 C1 1
 
76.01.01.07 Rubicline! (Rb,K)AlSi3O8 P1 1
 
76.01.01.08 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m
Help on Strunz Class: Strunz Class: 09.FA.30 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
 
09.FA.30 Buddingtonite (NH4)AlSi3O8•0.5(H2O) P 21 or P 21/m Mono
 
09.FA.30 Celsian BaAl2Si2O8 I21/c 2/m
 
09.FA.30 Anorthoclase (Na,K)AlSi3O8 C1 1
 
09.FA.30 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m
 
09.FA.30 Orthoclase KAlSi3O8 C 2/m 2/m
 
09.FA.30 Microcline KAlSi3O8 C1 1
 
09.FA.30 Rubicline! (Rb,K)AlSi3O8 P1 1
 
09.FA.30 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m
 

Other Anorthoclase Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Anorthoclase :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Franklin Minerals(Dunn)
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - MinMax(Deutsch)
14 - MinMax(English)
15 - Mineral and Gemstone Kingdom
16 - Mineralienatlas (Deutsch)
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - UCLA - Petrography Thin-Sections
20 - WWW-MINCRYST

Search for Anorthoclase using:

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

Visit our Advertisers for Anorthoclase :

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 Anorthoclase Mineral Data :

Ask about Anorthoclase 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 Anorthoclase Specimen Label here :

Anorthoclase

(Na,K)AlSi3O8
Dana No: 76.01.01.06 Strunz No: 09.FA.30
Locality:

 

Notes: