Sugilite Mineral Data
General Sugilite Information
Chemical Formula:
KNa2(Fe+++,Mn+++,Al)2Li3Si12O30
Composition:
Molecular Weight = 1,041.66 gm
Potassium 3.04 % K 3.66 % K2 O
Sodium 1.83 % Na 2.47 % Na2 O
Lithium 1.41 % Li 3.04 % Li2 O
Titanium 0.28 % Ti 0.46 % TiO2
Manganese 3.11 % Mn 4.47 % Mn2 O3
Aluminum 1.53 % Al 2.89 % Al2 O3
Iron 8.79 % Fe 12.57 % Fe2 O3
Silicon 32.35 % Si 69.22 % SiO2
Hydrogen 0.18 % H 1.57 % H2 O
Oxygen 47.48 % O
______ ______
100.00 % 100.35 % = TOTAL OXIDE
Empirical Formula:
K0.81 Na0.19 (H2 O)0.91 Na0.64 Fe3+ 1.32 Mn3+ 0.59 Ti0.06 Fe3+ 0.03 Li2.12 Al0.59 Fe3+ 0.29 Si12 O30
Environment:
Stratabound, metamorphosed manganese deposits and peralkaline ignous rocks.
IMA Status:
Approved IMA 1976
Locality:
Iwagi Islet, Ehime Prefecture, Japan. Link to MinDat.org Location Data.
Name Origin:
Named for Ken-ichi Sugi (1901-1948), Japanese petrologist
Name Pronunciation:
Sugilite
Synonym:
ICSD 202624
PDF 47-1840
Sugilite Image
Images:
Effenbergerite Sugilite
Comments: Blue effenbergerite pods to across in massive purple sugilite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa.
Scale: Crystal size 4 mm.
© John Veevaert
Images:
Sugilite Pectolite
Comments: Sharp terminated purple crystals of sugilite to 5mm on white, acicular pectolite.
Location: Wessels Mine, Kalahari, South Africa.
Scale: Picture size 1.5 cm.
© John Veevaert
Sugilite Crystallography
Axial Ratios:
a:c = 1:1.39934
Cell Dimensions:
a = 10.009, c = 14.006, Z = 2; V = 1,215.14 Den(Calc)= 2.85
Crystal System:
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc
X Ray Diffraction:
By Intensity(I/Io ): 4.32(1), 3.19(0.81), 4.06(0.57),
Physical Properties of Sugilite
Cleavage:
{0001} Indistinct
Color:
Brownish yellow, Violet, Reddish violet, Pale pink.
Density:
2.74
Diaphaneity:
Transparent to Translucent
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
6-6.5 - Orthoclase-Pyrite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Sugilite
Dichroism (e):
pink.
Dichroism (w):
pale pink.
Gladstone-Dale:
CI meas = 0.064 (Fair) - where the CI = (1-KPDmeas /KC ) CI calc = 0.1 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2082,KPDmeas = 0.2166,KC = 0.2314 Ncalc = 1.63 - 1.66
Optical Data:
Uniaxial (-), e=1.577-1.607, w=1.579-1.611, bire=0.0020-0.0040.
Calculated Properties of Sugilite
Electron Density:
Bulk Density (Electron Density)=2.71 gm/cc note: Specific Gravity of Sugilite =2.74 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PESugilite = 5.06 barns/electronU=PESugilite x r electron = 13.69 barns/cc.
Radioactivity:
GRapi = 43.31 (Gamma Ray American Petroleum Institute Units)
Concentration of Sugilite per GRapi unit = 2.31 (%)
Estimated Radioactivity from Sugilite - barely detectable
Sugilite Classification
Dana Class:
63.02.01a.09 (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 Sugilite Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Sugilite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - CalTech Mineral Spectroscopy
7 - EUROmin Project
8 - Ecole des Mines de Paris
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Tradeshop.com - The Rainbow of Gems
20 - WWW-MINCRYST
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Print or Cut-and-Paste your Sugilite Specimen Label here :
Sugilite
KNa2(Fe+++,Mn+++,Al)2Li3Si12O30
Dana No: 63.02.01a.09 Strunz No: 09.CM.05
Locality:
Notes:
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