Yagiite Mineral Data
General Yagiite Information
Chemical Formula:
(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60
Composition:
Molecular Weight = 1,991.71 gm
Potassium 1.47 % K 1.77 % K2 O
Sodium 2.60 % Na 3.50 % Na2 O
Magnesium 7.93 % Mg 13.15 % MgO
Aluminum 9.48 % Al 17.92 % Al2 O3
Silicon 30.32 % Si 64.86 % SiO2
Oxygen 48.20 % O
______ ______
100.00 % 101.20 % = TOTAL OXIDE
Empirical Formula:
Na2.25 K0.75 Mg4 Al4.5 Mg2.5 Si21.5 Al2.5 O60
Environment:
In silicate inclusions of an iron meteorite, crystallized in a magnesium-rich environment.
IMA Status:
Approved IMA 1969
Locality:
In the Colomera iron meteorite. Link to MinDat.org Location Data.
Name Origin:
Named for Kenzo Yagi, Professor of Geology, Hokkaido University, Sapporo, Japan.
Name Pronunciation:
Yagiite
Yagiite Crystallography
Axial Ratios:
a:c = 1:1.41625
Cell Dimensions:
a = 10.09, c = 14.29, Z = 1; V = 1,259.93 Den(Calc)= 2.62
Crystal System:
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmc
X Ray Diffraction:
By Intensity(I/Io ): 3.228(1), 5.059(0.65), 3.726(0.5),
Physical Properties of Yagiite
Color:
Colorless.
Density:
2.7
Diaphaneity:
Transparent
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Yagiite
Gladstone-Dale:
CI meas = 0.04 (Good) - where the CI = (1-KPDmeas /KC ) CI calc = 0.011 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2061,KPDmeas = 0.2,KC = 0.2084 Ncalc = 1.55 - 1.56
Optical Data:
Uniaxial (+), w=1.536, e=1.544, bire=0.0080.
Calculated Properties of Yagiite
Electron Density:
Bulk Density (Electron Density)=2.60 gm/cc note: Specific Gravity of Yagiite =2.62 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEYagiite = 1.80 barns/electronU=PEYagiite x r electron = 4.68 barns/cc.
Radioactivity:
GRapi = 21.09 (Gamma Ray American Petroleum Institute Units)
Concentration of Yagiite per GRapi unit = 4.74 (%)
Estimated Radioactivity from Yagiite - barely detectable
Yagiite Classification
Dana Class:
63.02.01a.10 (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
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 Yagiite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Yagiite :
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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Yagiite
(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60
Dana No: 63.02.01a.10 Strunz No: 09.CM.05
Locality:
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