Mineralogy Database

Almarudite Mineral Data

Search Webmineral :
  
Advertisment

General Almarudite Information

Help on Chemical  Formula: Chemical Formula: K([ ],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30]
Help on Composition: Composition: Molecular Weight = 1,000.32 gm
   Potassium   3.36 %  K     4.05 % K2O
   Sodium      0.48 %  Na    0.65 % Na2O
   Calcium     0.08 %  Ca    0.11 % CaO
   Magnesium   0.92 %  Mg    1.53 % MgO
   Manganese   5.66 %  Mn    7.30 % MnO
   Beryllium   1.86 %  Be    5.18 % BeO
   Aluminum    2.16 %  Al    4.08 % Al2O3
   Zinc        0.20 %  Zn    0.24 % ZnO
   Iron        3.46 %  Fe    4.45 % FeO
   Silicon    33.83 %  Si   72.38 % SiO2
   Oxygen     47.98 %  O
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.86Na0.21Mn2+1.03Fe2+0.62Mg0.38Zn0.03Ca0.02Be2.07Al0.8Si12.05O30
Help on Environment: Environment: In xenoliths in leucite tephrite lava. Milarite group; structure determined.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: A quarry at the Bellerberg volcano lava field, near Ettringen, 2 km north of Mayen, Laacher See region, eastern Eifel area, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After the authors� hosting and supporting institution, "Universit�t Wien", and is derived from the university�s proper name "ALma MAter RUDolphina".
Help on Synonym: Synonym: IMA2002-048
 

Almarudite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.40942
Help on Cell Dimensions: Cell Dimensions: a = 9.997, c = 14.09, Z = 2; V = 1,219.50 Den(Calc)= 2.72
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.882(1)(300), 3.187(0.9)(211), 4.076(0.8)(112),2.732(0.5)(204), 3.522(0.4)(004), 1.826(0.4)(315), 5(0.4)(110), 7.047(0.4)(002),
 

Physical Properties of Almarudite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Orange.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light orange
 

Optical Properties of Almarudite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2057,KC= 0.207
Ncalc = 1.56
Help on Optical Data: Optical Data: Uniaxial (-), e=1.559, w=1.56, bire=0.0010.
 

Calculated Properties of Almarudite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.69 gm/cc
note: Specific Gravity of Almarudite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEAlmarudite = 4.29 barns/electron
U=PEAlmarudite x relectron= 11.53 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 47.90 (Gamma Ray American Petroleum Institute Units)
Concentration of Almarudite per GRapi unit = 2.09 (%)

Estimated Radioactivity from Almarudite - barely detectable

 

Almarudite Classification

Help on  Dana Class: Dana Class: 63.02.01a.18 (63)Cyclosilicate Condensed Rings
  (63.02)6-membered rings
  (63.02.01a)Milarite - Osumilite group (Milarite - Osumilite subgroup)
 
63.02.01a.01 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.02 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
 
63.02.01a.03 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
 
63.02.01a.04 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.05 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.06 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.07 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.08 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.09 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.10 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
 
63.02.01a.11 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.12 Milarite K2Ca4Al2Be4Si24O60•(H2O) P 6/mcc 6/m 2/m 2/m
 
63.02.01a.13 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
 
63.02.01a.14 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63/mmc 6/m 2/m 2/m
 
63.02.01a.15 Berezanskite! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.02.01a.16 Shibkovite! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
 
63.02.01a.17 Trattnerite! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
 
63.02.01a.18 Almarudite! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m
 
63.02.01a.19 Oftedalite! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m
 
63.02.01a.20 Klochite ([]1Na1)KFe2Zn3[Si12O30] P 6/mcc 6/m 2/m 2/m
 
63.02.01a.21 Friedrichbeckeite! K([],Na)Mg2(Be2Mg)Si12O30 P 6/mcc 6/m 2/m 2/m
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 Almarudite Information

Help on References: References: NAME( CanMin, 42:1241) PHYS. PROP.(CanMin, 42:1241) OPTIC PROP.(CanMin, 42:1241)
Help on See Also: See Also: Links to other databases for Almarudite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Almarudite using:

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

Visit our Advertisers for Almarudite :

Ask about Almarudite 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 Espaol

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

Almarudite

K([ ],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30]
Dana No: 63.02.01a.18 Strunz No: 09.CM.05
Locality:

 

Notes:

 

 
   
 


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