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Dusmatovite

A valid IMA mineral species
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About DusmatoviteHide

01529020014949455743813.jpg
Tajik geologist and mineralogist Vyacheslav Djuraevitch Dusmatov.
Formula:
K(K◻)Mn2+2Zn3[Si12O30]
IMA formula given for dusmatovite is actually close to the correct formula for darapiosite (but with 2K in the B site rather than 2Na). However, this formula appears to be in error in several respects (both in the B and T2 site occupancies). The correct T2 site Li-free (all Zn) and B site (K+◻) end-member formula is given in Gagné & Hawthorne (2016).
Colour:
Dark blue, dirty blue, violet-brown
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.96
Crystal System:
Hexagonal
Member of:
Name:
For Vyacheslav Djuraevitch Dusmatov (1936-2004), Mineralogist and geologist who has done much work at the locality.
The Zn-dominant analogue of darapiosite. Unique combination of elements.

Dusmatovite differs from darapiosite in the dominance of Zn at the T2 site. Zn dominates over both Li and Mn.


Unique IdentifiersHide

Mindat ID:
6906
Long-form identifier:
mindat:1:1:6906:5
GUID
(UUID V4):
98f0bfb0-2aee-4654-87cc-43eac6fb69bb

Classification of DusmatoviteHide

Approved
First published:
1996
9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
63.2.1a.11

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
DusIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
DusThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of DusmatoviteHide

Vitreous
Transparency:
Translucent
Colour:
Dark blue, dirty blue, violet-brown
Streak:
Light blue
Hardness:
4½ on Mohs scale
Hardness:
VHN100=423 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
Basal
Density:
2.96(2) g/cm3 (Measured)    2.978 g/cm3 (Calculated)

Optical Data of DusmatoviteHide

Type:
Uniaxial (-)
RI values:
nω = 1.590 nε = 1.586
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
light blue (E), light violet (O)

Chemical Properties of DusmatoviteHide

Formula:
K(K◻)Mn2+2Zn3[Si12O30]

IMA formula given for dusmatovite is actually close to the correct formula for darapiosite (but with 2K in the B site rather than 2Na). However, this formula appears to be in error in several respects (both in the B and T2 site occupancies). The correct T2 site Li-free (all Zn) and B site (K+◻) end-member formula is given in Gagné & Hawthorne (2016).
IMA Formula:
KK2Mn2(Zn2LiSi12)O30
Common Impurities:
Li,Y,Mn(III),Zr,Fe

Crystallography of DusmatoviteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Cell Parameters:
a = 10.218(4) Å, c = 14.292(3) Å
Ratio:
a:c = 1 : 1.399
Unit Cell V:
1,292.28 ų (Calculated from Unit Cell)
Morphology:
grains in aggregates

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.15 Å(45)
3.75 Å(50)
3.25 Å(100)
2.545 Å(52)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of DusmatoviteHide

General Appearance of Type Material:
Grains, in aggregates up to 4 x 5 cm.
Place of Conservation of Type Material:
Museum of the Ilmen State Preserve, Miass, Russia.
Geological Setting of Type Material:
Boulder of pegmatite in a glacial moraine.
Associated Minerals at Type Locality:
Reference:
Pautov, L.A., Agakhanov, A.A., Sokolova, E.V., Ignatenko, K.I. (1996) Dusmatovite, a new mineral of the milarite group. Vestnik Moskovskogo Universiteta, Geologiya: 4: 54-60.

Synonyms of DusmatoviteHide

Other Language Names for DusmatoviteHide

German:Dusmatovit
Simplified Chinese:锰锌大隅石
Spanish:Dusmatovita
Traditional Chinese:錳鋅大隅石

Relationship of Dusmatovite to other SpeciesHide

Member of:
Other Members of this group:
Agakhanovite-(Y)K◻2(YCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
AlmaruditeK◻2Mn2+2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
AluminosugiliteKNa2Al2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ArmeniteBa(H2O)2Ca2Al3[Al3Si9O30]Orth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteK◻2Ti2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
BrannockiteK◻2Sn2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ChayesiteK◻2Mg2(Mg2Fe3+)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeKNa2Mn2(Zn2Li)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
EifeliteKNa2(MgNa)Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
KlöchiteK◻2(Fe2+Fe3+)Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
LaurentthomasiteK◻2Mg2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
MerrihueiteK(◻Na)Fe2+2Fe2+3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
MilariteK(◻H2O)Ca2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteK◻2(ScCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OsumiliteK◻2Fe2+2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite-(Mg)K◻2Mg2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteK◻2Na2B3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
RoedderiteK(◻Na)Mg2Mg3[Si12O30]Hex. 6 m2 : P62c
ShibkoviteK(◻K)Ca2Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SogdianiteK◻2Zr2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SugiliteKNa2Fe3+2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Trattnerite◻(◻)2Fe3+2Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
UM1990-73-SiO:KMnNaZnK(KNa0.50.5)(Mn1.5Na0.5)Zn3[Si12O30]Hex.
Unnamed (Mn3+-dominant analog of Sugilite)KNa2Mn3+2Li3[Si12O30]
YagiiteNa◻2Mg2Al3[Al2Si10O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Dusmatovite associated with Kupletskite-(Cs)Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4F
1 photo of Dusmatovite associated with AegirineNaFe3+Si2O6

Related Minerals - Strunz-mindat GroupingHide

9.CM.Agakhanovite-(Y)K◻2(YCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ArmeniteBa(H2O)2Ca2Al3[Al3Si9O30]Orth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05BrannockiteK◻2Sn2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK◻2Mg2(Mg2Fe3+)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeKNa2Mn2(Zn2Li)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa2(MgNa)Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05MerrihueiteK(◻Na)Fe2+2Fe2+3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05MilariteK(◻H2O)Ca2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)K◻2Mg2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OsumiliteK◻2Fe2+2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05PoudretteiteK◻2Na2B3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05RoedderiteK(◻Na)Mg2Mg3[Si12O30]Hex. 6 m2 : P62c
9.CM.05SogdianiteK◻2Zr2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SugiliteKNa2Fe3+2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05YagiiteNa◻2Mg2Al3[Al2Si10O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05BerezanskiteK◻2Ti2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ShibkoviteK(◻K)Ca2Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK◻2Mn2+2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05Trattnerite◻(◻)2Fe3+2Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteK◻2(ScCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05KlöchiteK◻2(Fe2+Fe3+)Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.CM.05FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05UM1990-73-SiO:KMnNaZnK(KNa0.50.5)(Mn1.5Na0.5)Zn3[Si12O30]Hex.
9.CM.05LaurentthomasiteK◻2Mg2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.9.CM.AluminosugiliteKNa2Al2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[Si6O18]2[Si12O30]F2Tric. 1 : P1

Other InformationHide

IR Spectrum:
1030 cm-1 (Si-O), 795cm-1 (ring silicate)
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for DusmatoviteHide

References for DusmatoviteHide

Reference List:

Localities for DusmatoviteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Tajikistan (TL)
 
  • Districts of Republican Subordination
 
矿物 and/or 产地  
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