Dusmatovite Mineral Data
General Dusmatovite Information
Chemical Formula:
K(K,Na,[ ])(Mn++,Y,Zr)2(Zn,Li)3Si12O30
Composition:
Molecular Weight = 1,176.31 gm
Potassium 5.32 % K 6.41 % K2 O
Sodium 0.59 % Na 0.79 % Na2 O
Lithium 0.44 % Li 0.95 % Li2 O
Yttrium 4.53 % Y 5.76 % Y2 O3
Zirconium 1.55 % Zr 2.10 % ZrO2
Manganese 5.60 % Mn 8.05 % Mn2 O3
Zinc 12.51 % Zn 15.57 % ZnO
Silicon 28.65 % Si 61.29 % SiO2
Oxygen 40.80 % O
______ ______
100.00 % 100.92 % = TOTAL OXIDE
Empirical Formula:
K1.6 Na0.3 Mn3+ 1.2 Y0.6 Zr0.2 Zn2.25 Li0.75 Si12 O30
Environment:
In a pegmatite boulder in a glacial moraine.
IMA Status:
Approved IMA 1995
Locality:
The Dara-i-Pioz alkaline massif, Tien Shan, Tajikistan. Link to MinDat.org Location Data.
Name Origin:
For Vyacheslav Djuraevitch Dusmatov (1936-), Mineralogist and geologist who has done much work at the locality.
Name Pronunciation:
Dusmatovite + Pronunciation
Synonym:
IMA1994-010
Dusmatovite Image
Images:
Dusmatovite
Comments: Violet-brown crystals of dusmatovite in a capsule.
Location: Dara-i-Pioz, Tadjikistan.
Scale: Not Given.
© Diederik Visser
Dusmatovite Crystallography
Axial Ratios:
a:c = 1:1.3987
Cell Dimensions:
a = 10.218, c = 14.292, Z = 2; V = 1,292.28 Den(Calc)= 3.02
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 ): 3.25(1), 2.548(0.52), 3.75(0.5), 4.15(0.45),
Physical Properties of Dusmatovite
Cleavage:
None
Color:
Blue, Dirty blue, Violet brown.
Density:
2.96
Diaphaneity:
Translucent
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Aggregates - Made of numerous individual crystals or clusters.
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous (Glassy)
Streak:
pale blue
Optical Properties of Dusmatovite
Gladstone-Dale:
CI meas = 0.043 (Good) - where the CI = (1-KPDmeas /KC ) CI calc = 0.062 (Fair) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1947,KPDmeas = 0.1986,KC = 0.2075 Ncalc = 1.61 - 1.63
Optical Data:
Uniaxial (-), e=1.586, w=1.59, bire=0.0040.
Calculated Properties of Dusmatovite
Electron Density:
Bulk Density (Electron Density)=2.88 gm/cc note: Specific Gravity of Dusmatovite =2.96 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEDusmatovite = 16.74 barns/electronU=PEDusmatovite x r electron = 48.26 barns/cc.
Radioactivity:
GRapi = 74.72 (Gamma Ray American Petroleum Institute Units)
Concentration of Dusmatovite per GRapi unit = 1.34 (%)
Estimated Radioactivity from Dusmatovite - barely detectable
Dusmatovite Classification
Dana Class:
63.02.01a.11 (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 Dusmatovite Information
References:
NAME( MinRec, Vol 28, No 3) PHYS. PROP.(Am.Min.,Vol.82,p430,1997) OPTIC PROP.(MinRec, Vol 28, No 3)
See Also:
Links to other databases for Dusmatovite :
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
11 - WWW-MINCRYST
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Dusmatovite
K(K,Na,[ ])(Mn++,Y,Zr)2(Zn,Li)3Si12O30
Dana No: 63.02.01a.11 Strunz No: 09.CM.05
Locality:
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