Mineralogy Database

Armenite Mineral Data

Search Webmineral :

General Armenite Information

Help on Chemical  Formula: Chemical Formula: BaCa2Al6Si9O30•2(H2O)
Help on Composition: Composition: Molecular Weight = 1,148.15 gm
   Barium    11.96 %  Ba   13.35 % BaO
   Calcium    6.98 %  Ca    9.77 % CaO
   Aluminum  14.10 %  Al   26.64 % Al2O3
   Silicon   22.02 %  Si   47.10 % SiO2
   Hydrogen   0.35 %  H     3.14 % H2O
   Oxygen    44.59 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaCa2Al6Si9O30•2(H2O)
Help on Environment: Environment: Silicate mineral found in Ba-rich hydrothermal veins or fissures.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1939
Help on Locality: Locality: Armen Mine, Kongsberg, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name origin for Armenite is the type locality.
Help on Name Pronunciation: Name Pronunciation: Armenite Say ARMENITE
Help on Synonym: Synonym: Calciocelsian
  ICSD 24977
  PDF 37-432

Armenite Image

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


Comments: Translucent, white armenite crystals.
Location: Simplon Pass, Brig, Valais, Switzerland. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Armenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7444:1:1.2969
Help on Cell Dimensions: Cell Dimensions: a = 18.66, b = 10.697, c = 13.874, Z = 4; V = 2,769.33 Den(Calc)= 2.75
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pnc2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.4(1), 3.86(0.98), 2.91(0.74),

Physical Properties of Armenite

Help on Cleavage: Cleavage: {010} Perfect, {110} Distinct
Help on Color: Color: Colorless, Gray green, White.
Help on Density: Density: 2.76
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Armenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.201,KPDmeas= 0.2002,KC= 0.2014
Ncalc = 1.55 - 1.56
Help on Optical Data: Optical Data: Biaxial (-), a=1.55, b=1.552, g=1.556, bire=0.0060, 2V(Calc)=72, 2V(Meas)=59.9-60.

Calculated Properties of Armenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Armenite =2.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEArmenite = 51.31 barns/electron
U=PEArmenite x rElectron Density= 137.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Armenite is Not Radioactive

Armenite Classification

Help on  Dana Class: Dana Class: 63.02.01b.01 (63)Cyclosilicate Condensed Rings
  (63.02)6-membered rings
  (63.02.01b)Milarite - Osumilite group
63.02.01b.01 Armenite BaCa2Al6Si9O30•2(H2O) Pnc2 mm2
Help on  Strunz Class: Strunz Class: 09.CM.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CM -[Si6O18]12- 6-membered double rings (sechser-Doppelringe)
09.CM.05 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Armenite BaCa2Al6Si9O30•2(H2O) Pnc2 mm2
09.CM.05 Berezanskite! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
09.CM.05 Shibkovite! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
09.CM.05 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
09.CM.05 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63/mmc 6/m 2/m 2/m
09.CM.05 Milarite K2Ca4Al2Be4Si24O60•(H2O) P 6/mcc 6/m 2/m 2/m
09.CM.05 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
09.CM.05 Oftedalite! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m
09.CM.05 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
09.CM.05 Trattnerite! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
09.CM.05 Almarudite! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m

Other Armenite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Armenite :
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 Armenite using:

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

Visit our Advertisers for Armenite :

Ask about Armenite 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 Espa´┐Żol

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


Dana No: 63.02.01b.01 Strunz No: 09.CM.05





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.