Dusmatovite Mineral Data

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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 % K₂O

Sodium 0.59 % Na 0.79 % Na₂O

Lithium 0.44 % Li 0.95 % Li₂O

Yttrium 4.53 % Y 5.76 % Y₂O₃

Zirconium 1.55 % Zr 2.10 % ZrO₂

Manganese 5.60 % Mn 8.05 % Mn₂O₃

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:

K_1.6Na_0.3Mn³⁺_1.2Y_0.6Zr_0.2Zn_2.25Li_0.75Si₁₂O₃₀

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 DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Dusmatovite= 16.74 barns/electron
U=PE_Dusmatovite 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 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
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:

Notes: