Armenite Mineral Data

[Minerals] [Gems] [Sale Items] [Gold Rings] [Big Stuff] [Main Page]
Shop early for Holiday Season and get the best stuff.
You can put it on layaway for up to six weeks!

General Armenite Information

Chemical Formula:

BaCa2Al6Si9O30•2(H2O)

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

Empirical Formula:

BaCa₂Al₆Si₉O₃₀•2(H₂O)

Environment:

Silicate mineral found in Ba-rich hydrothermal veins or fissures.

IMA Status:

Valid Species (Pre-IMA) 1939

Locality:

Armen Mine, Kongsberg, Norway. Link to MinDat.org Location Data.

Name Origin:

The name origin for Armenite is the type locality.

Name Pronunciation:

Armenite

Synonym:

Calciocelsian

ICSD 24977

PDF 37-432

Armenite Image

Images:

Armenite

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

Armenite Crystallography

Axial Ratios:

a:b:c =1.7444:1:1.2969

Cell Dimensions:

a = 18.66, b = 10.697, c = 13.874, Z = 4; V = 2,769.33 Den(Calc)= 2.75

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pnc2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.4(1), 3.86(0.98), 2.91(0.74),

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

Armbruster T , Czank M , American Mineralogist , 77 (1992) p.422-430, H2O ordering and superstructures in armenite, BaCa2Al6Si9O30.2H2O: A, single-crystal X-ray and TEM study, sample from Remigny, Quebec, Canada

View Additional jPOWD Structure files for Armenite
[1]

Physical Properties of Armenite

Cleavage:

{010} Perfect, {110} Distinct

Color:

Colorless, Gray green, White.

Density:

2.76

Diaphaneity:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

7.5 - Garnet

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Armenite

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

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

Electron Density:

Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Armenite =2.75 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Armenite= 51.31 barns/electron
U=PE_Armenite x rElectron Density= 137.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Armenite is Not Radioactive

Armenite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Armenite using:

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

Visit our Advertisers for Armenite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Armenite Mineral Data :

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 Español

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

Armenite

BaCa2Al6Si9O30•2(H2O)
Dana No: 63.02.01b.01 Strunz No: 09.CM.05
Locality:

Notes: