Dusmatovite
A valid IMA mineral species
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About Dusmatovite
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:
4½
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.
Dusmatovite differs from darapiosite in the dominance of Zn at the T2 site. Zn dominates over both Li and Mn.
Unique Identifiers
Mindat ID:
6906
Long-form identifier:
mindat:1:1:6906:5
GUID
(UUID V4):
(UUID V4):
98f0bfb0-2aee-4654-87cc-43eac6fb69bb
Classification of Dusmatovite
Approved
First published:
1996
Type description reference:
9.CM.05
9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
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)
63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
Mineral Symbols
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Dus | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Dus | The 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 Dusmatovite
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 Dusmatovite
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
light blue (E), light violet (O)
Chemical Properties of Dusmatovite
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 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 Dusmatovite
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 Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.15 Å | (45) |
3.75 Å | (50) |
3.25 Å | (100) |
2.545 Å | (52) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Dusmatovite
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 Dusmatovite
Other Language Names for Dusmatovite
German:Dusmatovit
Russian:Дусматовит
Simplified Chinese:锰锌大隅石
Spanish:Dusmatovita
Traditional Chinese:錳鋅大隅石
Relationship of Dusmatovite to other Species
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 |
Almarudite | K◻2Mn2+2(Be2Al)[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm |
Aluminosugilite | KNa2Al2Li3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Armenite | Ba(H2O)2Ca2Al3[Al3Si9O30] | Orth. mmm (2/m 2/m 2/m) : Pnna |
Berezanskite | K◻2Ti2Li3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Brannockite | K◻2Sn2Li3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Chayesite | K◻2Mg2(Mg2Fe3+)[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Darapiosite | KNa2Mn2(Zn2Li)[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Eifelite | KNa2(MgNa)Mg3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Friedrichbeckeite | K(◻Na)Mg2(Be2Mg)[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Klöchite | K◻2(Fe2+Fe3+)Zn3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Laurentthomasite | K◻2Mg2(Be2Al)[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Merrihueite | K(◻Na)Fe2+2Fe2+3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Milarite | K(◻H2O)Ca2(Be2Al)[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Oftedalite | K◻2(ScCa)Be3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Osumilite | K◻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 |
Poudretteite | K◻2Na2B3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Roedderite | K(◻Na)Mg2Mg3[Si12O30] | Hex. 6 m2 : P62c |
Shibkovite | K(◻K)Ca2Zn3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Sogdianite | K◻2Zr2Li3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Sugilite | KNa2Fe3+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:KMnNaZn | K(KNa0.5◻0.5)(Mn1.5Na0.5)Zn3[Si12O30] | Hex. |
Unnamed (Mn3+-dominant analog of Sugilite) | KNa2Mn3+2Li3[Si12O30] | |
Yagiite | Na◻2Mg2Al3[Al2Si10O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Common Associates
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 Aegirine | NaFe3+Si2O6 |
Related Minerals - Strunz-mindat Grouping
9.CM. | Agakhanovite-(Y) | K◻2(YCa)Be3[Si12O30] |
9.CM.05 | Armenite | Ba(H2O)2Ca2Al3[Al3Si9O30] |
9.CM.05 | Brannockite | K◻2Sn2Li3[Si12O30] |
9.CM.05 | Chayesite | K◻2Mg2(Mg2Fe3+)[Si12O30] |
9.CM.05 | Darapiosite | KNa2Mn2(Zn2Li)[Si12O30] |
9.CM.05 | Eifelite | KNa2(MgNa)Mg3[Si12O30] |
9.CM.05 | Merrihueite | K(◻Na)Fe2+2Fe2+3[Si12O30] |
9.CM.05 | Milarite | K(◻H2O)Ca2(Be2Al)[Si12O30] |
9.CM.05 | Osumilite-(Mg) | K◻2Mg2Al3[Al2Si10O30] |
9.CM.05 | Osumilite | K◻2Fe2+2Al3[Al2Si10O30] |
9.CM.05 | Poudretteite | K◻2Na2B3[Si12O30] |
9.CM.05 | Roedderite | K(◻Na)Mg2Mg3[Si12O30] |
9.CM.05 | Sogdianite | K◻2Zr2Li3[Si12O30] |
9.CM.05 | Sugilite | KNa2Fe3+2Li3[Si12O30] |
9.CM.05 | Yagiite | Na◻2Mg2Al3[Al2Si10O30] |
9.CM.05 | Berezanskite | K◻2Ti2Li3[Si12O30] |
9.CM.05 | Shibkovite | K(◻K)Ca2Zn3[Si12O30] |
9.CM.05 | Almarudite | K◻2Mn2+2(Be2Al)[Si12O30] |
9.CM.05 | Trattnerite | ◻(◻)2Fe3+2Mg3[Si12O30] |
9.CM.05 | Oftedalite | K◻2(ScCa)Be3[Si12O30] |
9.CM.05 | Klöchite | K◻2(Fe2+Fe3+)Zn3[Si12O30] |
9.CM.05 | Friedrichbeckeite | K(◻Na)Mg2(Be2Mg)[Si12O30] |
9.CM.05 | UM1990-73-SiO:KMnNaZn | K(KNa0.5◻0.5)(Mn1.5Na0.5)Zn3[Si12O30] |
9.CM.05 | Laurentthomasite | K◻2Mg2(Be2Al)[Si12O30] |
9.CM.9.CM. | Aluminosugilite | KNa2Al2Li3[Si12O30] |
9.CM.10 | Faizievite | K2Na(Ca6Na)Ti4Li6[Si6O18]2[Si12O30]F2 |
Other Information
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 Dusmatovite
mindat.org URL:
https://www.mindat.org/min-6906.html
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References for Dusmatovite
Reference List:
Localities for Dusmatovite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Tajikistan (TL) | |
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Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan