Aleksandrovite (original) (raw)
A valid IMA mineral species
Formula:
KCa7Sn2Li3Si12O36F2
Crystal System:
Monoclinic
Name:
Named in honour of Stanislav Mikhailovich Aleksandrov (Станислав Михайлович Александров) (14 June 1932 - 9 May 2012), a well-known Russian geochemist, geologist, and mineralogist, for his great contributions in geology, geochemistry, and the mineralogy of tin.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:39438:5
053d95f3-cac9-4fd2-bae6-a3269dbf2d26
IMA Classification of AleksandroviteHide
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Classification of AleksandroviteHide
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9.CJ.25
9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Asd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of AleksandroviteHide
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Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Sorry, your browser doesn't support HTML5 audio. | Jolyon Ralph | United Kingdom |
Physical Properties of AleksandroviteHide
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Comment:
Pearly on cleaved surfaces.
Hardness:
VHN50=276 - 319 kg/mm2 - Vickers
Density:
3.05(2) g/cm3 (Measured) 3.07(2) g/cm3 (Calculated)
Optical Data of AleksandroviteHide
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RI values:
_n_α = 1.629(2) _n_β = 1.635(4) _n_γ = 1.638(2)
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of AleksandroviteHide
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Mindat Formula:
KCa7Sn2Li3Si12O36F2
Crystallography of AleksandroviteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 17.01(2) Å, b = 9.751(6) Å, c = 21.00(2) Å
β = 112.45(8)°
Ratio:
a:b:c = 1.744 : 1 : 2.154
Morphology:
Lamellae up to 50–70 μm with no detectable zoning or zoned crystals. Aggregates of zoned and sectorial grains where separate zones represented by aleksandrovite, baratovite, or katayamalite.
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.86 Å | (21) |
| 3.712 Å | (33) |
| 3.234 Å | (100) |
| 3.206 Å | (34) |
| 3.039 Å | (28) |
| 2.894 Å | (42) |
| 2.425 Å | (42) |
| 1.950 Å | (25) |
Geological EnvironmentHide
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Type Occurrence of AleksandroviteHide
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General Appearance of Type Material:
Inclusions in baratovite. As lamellae up to 50–70 µm with no detectable zoning, as zoned crystals up to 0.8 mm, and aggregates of zoned and sectorial grains where separate zones represented by aleksandrovite, baratovite, or katayamalite.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (registration No. 3825/1).
Geological Setting of Type Material:
In a zonal microcline-calcite vein with aegirine-hedenbergite, quartz, and albite in a moraine boulder of intensively altered clay schist.
Associated Minerals at Type Locality:
Synonyms of AleksandroviteHide
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Related Minerals - Strunz-mindat GroupingHide
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| 9.CJ. | Avdeevite | NaAl4(Be5Li)(Si6O18)2(H2O)1-2 | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
|---|---|---|---|
| 9.CJ. | Nakkaalaaqite | K2[Na3Ca]LiCa2Ti2Be4Si12O38 | Orth. m m m _(_2/_m_2/_m_2/m ) : F d d d |
| 9.CJ. | Zolotarevite | Na5Zr[Si6O15(OH)3] · 3H2O | Trig. 3_m_ _(_32/m ) : R_3_m |
| 9.CJ. | Beryllocordierite-Na | NaMg4(Al5Be)(AlSi5O18)2 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 9.CJ. | Beryllosachanbińskiite-Na | NaMn4(Al5Be)(AlSi5O18)2 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 9.CJ.05 | Bazzite | Be3Sc2(Si6O18) | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_6/m c c |
| 9.CJ.05 | Beryl | Be3Al2(Si6O18) | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_6/m c c |
| 9.CJ.05 | Indialite | Mg2Al3(AlSi5O18) | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_6/m c c |
| 9.CJ.05 va | Vorobyevite | Be3Al2(Si6O18) | |
| 9.CJ.05 | Stoppaniite | Be3Fe3+2(Si6O18) · H2O | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_6/m c c |
| 9.CJ.05 | Ferroindialite | (Fe2+,Mg)2Al4Si5O18 | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_6/m c c |
| 9.CJ.05 | Johnkoivulaite | Cs[Be2B]Mg2Si6O18 | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_6/m c c |
| 9.CJ.10 | Cordierite | (Mg,Fe)2Al3(AlSi5O18) | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 9.CJ.10 | Sekaninaite | (Fe,Mg)2Al3(AlSi5O18) | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 9.CJ.15a | Combeite | Na4.5Ca3.5Si6O17.5(OH)0.5 | Trig. 3_m_ _(_32/m ) : R_3_m |
| 9.CJ.15b | Imandrite | Na12Ca3Fe3+2(Si6O18)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.CJ.15a | Kazakovite | Na6Mn2+Ti(Si6O18) | Trig. 3_m_ _(_32/m ) : R_3_m |
| 9.CJ.15c | Koashvite | Na6(Ca,Mn)(Ti,Fe)Si6O18 · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.CJ.15a | Lovozerite | Na2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2O | Trig. 3 : _R_3 |
| 9.CJ.15a | Tisinalite | Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O | Trig. 3_m_ _(_32/m ) |
| 9.CJ.15a | Zirsinalite | Na6(Ca,Mn2+,Fe2+)Zr(Si6O18) | Trig. 3_m_ _(_32/m ) : R_3_m |
| 9.CJ.15a | Litvinskite | Na2(◻,Na,Mn)ZrSi6O12(OH,O)6 | Mon. m : B m |
| 9.CJ.15a | Kapustinite | Na6ZrSi6O16(OH)2 | Mon. 2/m : _B_2/m |
| 9.CJ.15a | Townendite | Na8ZrSi6O18 | Trig. 3_m_ _(_32/m ) : R_3_m |
| 9.CJ.25 | Baratovite | KCa7(Ti,Zr)2Li3Si12O36F2 | Mon. 2/m : _B_2/b |
| 9.CJ.25 | Katayamalite | KLi3Ca7Ti2(SiO3)12(OH)2 | Mon. 2/m : _B_2/b |
| 9.CJ.30 | Dioptase | CuSiO3 · H2O | Trig. 3 : _R_3 |
| 9.CJ.35 | Kostylevite | K2Zr(Si3O9) · H2O | Mon. 2/m : _P_21/b |
| 9.CJ.40 | Petarasite | Na5Zr2(Si6O18)(Cl,OH) · 2H2O | Mon. 2/m : _P_21/m |
| 9.CJ.45 | Gerenite-(Y) | (Ca,Na)2(Y,REE)3Si6O18 · 2H2O | Tric. 1 : _P_1 |
| 9.CJ.50 | Odintsovite | K2Na4Ca3Ti2Be4Si12O38 | Orth. m m m _(_2/_m_2/_m_2/m ) : F d d d |
| 9.CJ.55 | Mathewrogersite | Pb7FeAl3GeSi12O36(OH,H2O)6 | Trig. |
| 9.CJ.60 | Pezzottaite | Cs(Be2Li)Al2(Si6O18) | Trig. 3 : _R_3 |
Fluorescence of AleksandroviteHide
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Light blue under short-wave (254 nm) UV radiation.
Other InformationHide
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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 AleksandroviteHide
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References for AleksandroviteHide
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Reference List:
Localities for AleksandroviteHide
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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
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- 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.