登录
Maleevite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Maleevite
Bulgarian mineralogist Mikhail Naidenovitch Maleev.
Formula:
BaB2Si2O8
Colour:
White
Lustre:
Vitreous
Hardness:
7
Specific Gravity:
3.78
Crystal System:
Orthorhombic
Name:
After the Bulgarian mineralogist Mikhail Naidenovitch Maleev (born 1940), a well known expert on the morphology of crystals and mineral systematics.
The barium analogue of Danburite and Pekovite.
The structure has paracelsian topology; as such, the species may alternatively be grouped within "paracelsian group", alongside with danburite, pekovite, paracelsian, hurlbutite, and strontiohurlbutite.
The structure has paracelsian topology; as such, the species may alternatively be grouped within "paracelsian group", alongside with danburite, pekovite, paracelsian, hurlbutite, and strontiohurlbutite.
Unique Identifiers
Mindat ID:
25698
Long-form identifier:
mindat:1:1:25698:8
IMA Classification of Maleevite
Approved
Approval year:
2002
First published:
2004
Type description reference:
Pautov, L. A., Agakhanov, A. A., Sokolova, E., Hawthorne, F. C. (2004) Maleevite, BaB2Si2O8 and pekovite, SrB2Si2O8, new mineral species from the Dara-i-Pioz alkaline massif, Northern Tajikistan: description and crystal structure. The Canadian Mineralogist, 42 (1) 107-119 doi:10.2113/gscanmin.42.1.107
Classification of Maleevite
9.FA.65
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mle | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Maleevite
Vitreous
Transparency:
Transparent
Colour:
White
Streak:
White
Hardness:
7 on Mohs scale
Hardness:
VHN50=997 - 1139 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.78(1) g/cm3 (Measured) 3.79 g/cm3 (Calculated)
Optical Data of Maleevite
Type:
Biaxial (-)
RI values:
nα = 1.649 nβ = 1.656 nγ = 1.656
Max. Birefringence:
δ = 0.007
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (-0°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (-0°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Chemistry of Maleevite
Mindat Formula:
BaB2Si2O8
Element Weights:
Elements listed:
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| SiO2 | 35.54 % |
| Al2O3 | 0.05 % |
| B2O3 (by stoichiometry) | 20.61 % |
| CaO | 0.01 % |
| SrO | 0.27 % |
| BaO | 44.09 % |
| PbO | 0.37 % |
| K2O | 0.03 % |
| Total: | 100.97 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Ba0.97Pb0.01Sr0.01)[B2.00Si2.00O8] |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan | Thin section containing a roughly 2 mm x 1 mm fractured mass of maleevite, associated with primarily leucosphenite, quartz, and alkali feldspar, in rare-element (Cs, Li, B)-rich granite. Analysis by EPMA; B2O3 estimated by stoichiometry. |
Crystallography of Maleevite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Cell Parameters:
a = 8.141 Å, b = 8.176 Å, c = 9.038 Å
Ratio:
a:b:c = 0.996 : 1 : 1.105
Unit Cell V:
601.58 ų
Z:
2
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005928 | Maleevite | Pautov L A, Agakhanov A A, Sokolova E V, Hawthorne F C (2004) Maleevite, BaB2Si2O8, and pekovite, SrB2Si2O8, new mineral species from the Dara-i-Pioz alkaline massif, Northern Tajikistan: Description and crystal structure The Canadian Mineralogist 42 107-119 |  | 2004 | Dara-i-Pioz alkaline massif, Northern Tajikistan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.62 Å | (1) |
| 2.021 Å | (0.7) |
| 3.39 Å | (0.6) |
| 6.07 Å | (0.6) |
| 2.83 Å | (0.5) |
| 2.481 Å | (0.4) |
| 4.86 Å | (0.3) |
Reference:
Pautov, L. A., Agakhanov, A. A., Sokolova, E., Hawthorne, F. C. (2004) Maleevite, BaB2Si2O8 and pekovite, SrB2Si2O8, new mineral species from the Dara-i-Pioz alkaline massif, Northern Tajikistan: description and crystal structure. The Canadian Mineralogist, 42 (1) 107-119 doi:10.2113/gscanmin.42.1.107
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 Maleevite
General Appearance of Type Material:
Anhedral equant crystals from 0.5 to 2 mm in diameter.
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Russian Academy of Science, Moscow, Russia.
Geological Setting of Type Material:
Aegirine-microcline-quartz pegmatite in syenite
Associated Minerals at Type Locality:
Reference:
Pautov, L. A., Agakhanov, A. A., Sokolova, E., Hawthorne, F. C. (2004) Maleevite, BaB2Si2O8 and pekovite, SrB2Si2O8, new mineral species from the Dara-i-Pioz alkaline massif, Northern Tajikistan: description and crystal structure. The Canadian Mineralogist, 42 (1) 107-119 doi:10.2113/gscanmin.42.1.107
Synonyms of Maleevite
Other Language Names for Maleevite
Common Associates
Associations Based on Photo Data:
| 3 photos of Maleevite associated with Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| 3 photos of Maleevite associated with Quartz | SiO2 |
| 3 photos of Maleevite associated with Leucosphenite | BaNa4Ti2B2Si10O30 |
| 3 photos of Maleevite associated with Microcline | K(AlSi3O8) |
| 1 photo of Maleevite associated with Albite | Na(AlSi3O8) |
| 1 photo of Maleevite associated with Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
| 1 photo of Maleevite associated with Kupletskite-(Cs) | Cs2NaMn2+7Ti2[Si4O12]2O2(OH)4F |
Related Minerals - Strunz-mindat Grouping
| 9.FA. | Bonaccorsiite | KK2Na3(Al6Si36)O84 |
| 9.FA. | Hexacelsian | BaAl2Si2O8 |
| 9.FA. | Wodegongjieite | KCa3(Al7Si9)O32 |
| 9.FA.05 | Panunzite | (K,Na)AlSiO4 |
| 9.FA.05 | Yoshiokaite | (Ca,Na)[Al(Al,Si)O4] |
| 9.FA.05 | Nepheline | Na3K(Al4Si4O16) |
| 9.FA.05 | Trinepheline | NaAlSiO4 |
| 9.FA.05 | Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
| 9.FA.05 | Kaliophilite | KAlSiO4 |
| 9.FA.05 | Kalsilite | KAlSiO4 |
| 9.FA.05 | 'Carnegieite' | NaAlSiO4 |
| 9.FA.05 | Megakalsilite | KAlSiO4 |
| 9.FA.05 | Trikalsilite | K2NaAl3(SiO4)3 |
| 9.FA.10 | Malinkoite | NaBSiO4 |
| 9.FA.15 | Virgilite | LiAlSi2O6 |
| 9.FA.25 | Lisitsynite | KBSi2O6 |
| 9.FA.30 | Ferrisanidine | K[Fe3+Si3O8] |
| 9.FA.30 | Buddingtonite | (NH4)(AlSi3O8) |
| 9.FA.30 | Rubicline | Rb(AlSi3O8) |
| 9.FA.30 | 'Monalbite' | NaAlSi3O8 |
| 9.FA.30 | Microcline | K(AlSi3O8) |
| 9.FA.30 va | 'Germanate-celsian' | BaAl2Ge2O8 |
| 9.FA.30 | Celsian | Ba(Al2Si2O8) |
| 9.FA.30 | Sanidine | K(AlSi3O8) |
| 9.FA.30 | Orthoclase | K(AlSi3O8) |
| 9.FA.35 | Reedmergnerite | NaBSi3O8 |
| 9.FA.35 | Albite | Na(AlSi3O8) |
| 9.FA.35 | Anorthite | Ca(Al2Si2O8) |
| 9.FA.40 | Paracelsian | Ba(Al2Si2O8) |
| 9.FA.45 | Svyatoslavite | Ca(Al2Si2O8) |
| 9.FA.45 | Kumdykolite | Na(AlSi3O8) |
| 9.FA.50 | Slawsonite | Sr(Al2Si2O8) |
| 9.FA.55 | Lisetite | CaNa2Al4Si4O16 |
| 9.FA.60 | Stronalsite | Na2SrAl4Si4O16 |
| 9.FA.60 | Banalsite | Na2BaAl4Si4O16 |
| 9.FA.65 | Pekovite | SrB2Si2O8 |
| 9.FA.65 | Danburite | CaB2Si2O8 |
| 9.FA.70 | Liebermannite | KAlSi3O8 |
| 9.FA.70 | Lingunite | NaAlSi3O8 |
| 9.FA.70 | Stöfflerite | CaAl2Si2O8 |
| 9.FA.75 | Pfaffenbergite | KNa3(Al4Si12)O32 |
| 9.FA.75 | Kokchetavite | K(AlSi3O8) |
Fluorescence of Maleevite
Bright blue in short-wave ultraviolet light
Other Information
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 Maleevite
mindat.org URL:
https://www.mindat.org/min-25698.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Maleevite
Reference List:
Pautov, L. A., Agakhanov, A. A., Sokolova, E., Hawthorne, F. C. (2004) Maleevite, BaB2Si2O8 and pekovite, SrB2Si2O8, new mineral species from the Dara-i-Pioz alkaline massif, Northern Tajikistan: description and crystal structure. The Canadian Mineralogist, 42 (1) 107-119 doi:10.2113/gscanmin.42.1.107
Mandarino, Joseph A. (2004) New minerals. The Canadian Mineralogist, 42 (6) 1901-1927 doi:10.2113/gscanmin.42.6.1901
Localities for Maleevite
Showing 1 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Tajikistan (TL) | |
| Pautov et al. (2004) |
Quick NavTopAbout MaleeviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Chemical AnalysisCrystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan