Mineralogy Database

Chayesite Mineral Data

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General Chayesite Information

Help on Chemical  Formula: Chemical Formula: K(Mg,Fe++)4Fe+++(Si12O30)
Help on Composition: Composition: Molecular Weight = 1,040.72 gm
   Potassium   3.76 %  K     4.53 % K2O
   Magnesium   7.01 %  Mg   11.62 % MgO
   Iron       10.73 %  Fe    6.90 % FeO /  7.67 % Fe2O3
   Silicon    32.38 %  Si   69.28 % SiO2
   Oxygen     46.12 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KMg3Fe2+Fe3+Si12O30
Help on Environment: Environment: A late-crystallizing mineral, nonuniformly distributed in the groundmass of lamproites.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: From Moon Canyon, east of Francis, Summit Co., Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Felix Chayes (1916-1993) of the Geophysical Laboratory, Carnegie Institute, Washington, D.C., USA.
Help on Synonym: Synonym: ICSD 23369
  PDF 45-1472
 

Chayesite Image

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  Chayesite

Comments: Crystalline aggregate of rusty red, thin tabular hexagonal plates of chayesite stacked along the c-axis on matrix.
Location: Pauliberg Mt., Kobersdorf, Oberpullendorf, Burgenland, Austria. Scale: Crystal size 0.5 mm.
© Tom Loomis / Dakota Matrix

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  Merrihueite   Chayesite

Comments: A sharp, chemically zoned crystal of copper-brown merrihueite(?) (see Lapis-Magazine 4/2002 Page 38/39) overgrown on bluish chayesite.
Location: Basalt quarry, Pauliberg Mt., Kobersdorf, Oberpullendorf, Burgenland, Austria. Scale: Crystal Size 0.15 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Chayesite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.41711
Help on Cell Dimensions: Cell Dimensions: a = 10.153, c = 14.388, Z = 2; V = 1,284.46 Den(Calc)= 2.69
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): 3.24(1), 3.75(1), 5.08(1),
 

Physical Properties of Chayesite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark blue.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Chayesite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2143,KC= 0.2133
Ncalc = 1.57
Help on Optical Data: Optical Data: Uniaxial (+), w=1.575, e=1.578, bire=0.0030.
 

Calculated Properties of Chayesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Chayesite =2.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEChayesite = 4.94 barns/electron
U=PEChayesite x relectron= 13.14 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 53.63 (Gamma Ray American Petroleum Institute Units)
Concentration of Chayesite per GRapi unit = 1.86 (%)

Estimated Radioactivity from Chayesite - barely detectable

 

Chayesite Classification

Help on  Dana Class: Dana Class: 63.02.01a.02 (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 Chayesite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.74,p1368-1373,1989) OPTIC PROP.(Am.Min.,Vol.74,p1368-1373,1989)
Help on See Also: See Also: Links to other databases for Chayesite :
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

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

Chayesite

K(Mg,Fe++)4Fe+++(Si12O30)
Dana No: 63.02.01a.02 Strunz No: 09.CM.05
Locality:

 

Notes:

 

 
   
 


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