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Yagiite

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04551960014947345269286.jpg
Kenzo Yagi
Formula:
NaMg2(AlMg2Si12)O30
Colour:
Colourless
Hardness:
5 - 6
Specific Gravity:
2.70 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named by Theodore E. Bunch and Louis H. Fuchs in 1969 in honor of Kenzo Yagi (15 September 1915, Nagano City, Nagano Prefecture, Japan - ), Professor of Geology, Hokkaido University, Sapporo, Japan for his contributions to mineralogy and petrology.
Na-dominant member of the osumilite group.


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Classification of YagiiteHide

Approved
Approval Year:
1968
First Published:
1969
9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
63.2.1a.10

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
16.8.5

16 : Silicates Containing Aluminum and other Metals
8 : Aluminosilicates of Mg and alkalis

Physical Properties of YagiiteHide

Transparency:
Transparent, Translucent
Colour:
Colourless
Comment:
Can be very light blue in thin section
Hardness:
5 - 6 on Mohs scale
Density:
2.70 g/cm3 (Calculated)

Optical Data of YagiiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.536 nε = 1.544
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of YagiiteHide

Formula:
NaMg2(AlMg2Si12)O30
Common Impurities:
Ti,Cr,Fe,Mn,Ca

Crystallography of YagiiteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Cell Parameters:
a = 10.09 Å, c = 14.29 Å
Ratio:
a:c = 1 : 1.416
Unit Cell V:
1,259.93 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.228 Å(100)
5.059 Å(65)
3.726 Å(50)
2.765 Å(50)
2.090 Å(40)
7.12 Å(30)
2.003 Å(30)

Type Occurrence of YagiiteHide

General Appearance of Type Material:
Interstitial to small equant grains.
Geological Setting of Type Material:
Silicate inclusions in an iron meteorite.
Associated Minerals at Type Locality:

Synonyms of YagiiteHide

Other Language Names for YagiiteHide

Relationship of Yagiite to other SpeciesHide

Member of:
Other Members of this group:
Agakhanovite-(Y)(YCa)□2KBe3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
AlmaruditeK(◻,Na)2(Mn,Fe,Mg)2[(Be,Al)3Si12]O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
AluminosugiliteKNa2Al2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteKTi2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
BrannockiteKSn2(Li3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ChayesiteK(Mg,Fe2+)4Fe3+[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DusmatoviteKK2Mn2(Zn2LiSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
EifeliteKNa3Mg4Si12O30Hex.
FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Klöchite(Fe2+Fe3+)◻2KZn3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Merrihueite(K,Na)2(Fe2+,Mg)5Si12O30Hex.
MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteKSc22Be3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
Osumilite-(Mg)KMg2Al3(Al2Si10)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
RoedderiteKNaMg2(Mg3Si12)O30Hex. 6 m2 : P62c
ShibkoviteK2Ca2(Zn3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SogdianiteKZr2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SugiliteKNa2Fe3+2(Li3Si12)O30Hex.
TrattneriteFe3+2(Mg3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
UM1990-73-SiO:KMnNaZn(K,Na)2Zn3Mn1.5Si12O30Hex.
Unnamed (Mn3+-dominant analog of Sugilite)KNa2(Mn3+,Fe3+,Al)2Li3Si12O30

Related Minerals - Nickel-Strunz GroupingHide

9.CM.Agakhanovite-(Y)(YCa)□2KBe3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05BrannockiteKSn2(Li3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK(Mg,Fe2+)4Fe3+[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa3Mg4Si12O30Hex.
9.CM.05Merrihueite(K,Na)2(Fe2+,Mg)5Si12O30Hex.
9.CM.05MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)KMg2Al3(Al2Si10)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
9.CM.05PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05RoedderiteKNaMg2(Mg3Si12)O30Hex. 6 m2 : P62c
9.CM.05SogdianiteKZr2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SugiliteKNa2Fe3+2(Li3Si12)O30Hex.
9.CM.05BerezanskiteKTi2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DusmatoviteKK2Mn2(Zn2LiSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ShibkoviteK2Ca2(Zn3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK(◻,Na)2(Mn,Fe,Mg)2[(Be,Al)3Si12]O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05TrattneriteFe3+2(Mg3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteKSc22Be3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.9.CM.AluminosugiliteKNa2Al2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[Si6O18]2[Si12O30]F2Tric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

63.2.1a.1BrannockiteKSn2(Li3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.2ChayesiteK(Mg,Fe2+)4Fe3+[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.3DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.4EifeliteKNa3Mg4Si12O30Hex.
63.2.1a.5Merrihueite(K,Na)2(Fe2+,Mg)5Si12O30Hex.
63.2.1a.6Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
63.2.1a.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.9SugiliteKNa2Fe3+2(Li3Si12)O30Hex.
63.2.1a.11DusmatoviteKK2Mn2(Zn2LiSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.12MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.13SogdianiteKZr2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.14RoedderiteKNaMg2(Mg3Si12)O30Hex. 6 m2 : P62c

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.8.1PreiswerkiteNaMg2Al(Al2Si2O10)(OH)2Mon.
16.8.3NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2Mon. 2/m : B2/m
16.8.4Ferrierite
16.8.6PhlogopiteKMg3(AlSi3O10)(OH)2Mon. 2/m : B2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for YagiiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bunch, T.E., Fuchs, L.H. (1969) Yagiite, a new sodium-magnesium analogue of osumilite. American Mineralogist: 54: 14-18.

Internet Links for YagiiteHide

Localities for YagiiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Spain (TL)
 
  • Andalusia
    • Granada
      • Benalúa de las Villas
[AM 54 (1969), 14; Nickel & Nichols, 1991 - "Mineral Reference Manual", p233]
 
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