Bakhchisaraitsevite
A valid IMA mineral species
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About Bakhchisaraitsevite
Alexander Y. Bakhchisaraitsev
Formula:
Na2Mg5(PO4)4 · 7H2O
Colour:
Light yellow, colourless or greenish
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
2.50
Crystal System:
Monoclinic
Name:
Named in honor of Alexander Yuryevich Bakhchisaraitsev (Александр Юрьевич Бахчисарайцев) (1947–1998), crystallographer from the Geological Institute of the Kola Scientific Center of the Russian Academy of Sciences, Apatity.
Unique Identifiers
Mindat ID:
7074
Long-form identifier:
mindat:1:1:7074:0
GUID
(UUID V4):
(UUID V4):
fe6dd308-ec93-417b-84ea-2df42d0bb433
IMA Classification of Bakhchisaraitsevite
Approved
First published:
2000
Classification of Bakhchisaraitsevite
8.CH.50
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
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 |
|---|---|---|
| Bkc | 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 Bakhchisaraitsevite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Bakhchisaraitsevite
Vitreous
Transparency:
Transparent
Colour:
Light yellow, colourless or greenish
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001} perfect
{001} perfect
Density:
2.50(2) g/cm3 (Measured) 2.499 g/cm3 (Calculated)
Comment:
Calculated value from Yakubovich et al. (2000).
Optical Data of Bakhchisaraitsevite
Type:
Biaxial (+)
RI values:
nα = 1.538(1) nβ = 1.540(1) nγ = 1.543(1)
2V:
Calculated: 72.5°
Max Birefringence:
δ = 0.005
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:
Low
Dispersion:
none
Chemistry of Bakhchisaraitsevite
Mindat Formula:
Na2Mg5(PO4)4 · 7H2O
Crystallography of Bakhchisaraitsevite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.3086(8) Å, b = 12.906(1) Å, c = 17.486(2) Å
β = 102.01(1)°
β = 102.01(1)°
Ratio:
a:b:c = 0.644 : 1 : 1.355
Unit Cell V:
1834 ų
Z:
4
Twinning:
None observed
Comment:
From Yakubovich et al. (2000).
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0005687 | Bakhchisaraitsevite | Yakubovich O V, Massa W, Liferovich R P, Pakhomovsky Y A (2000) The crystal structure of bakhchisaraitsevite, [Na2(H2O)2]{(Mg4.5Fe0.5)(PO4)4(H2O)5}, a new mineral species of hydrothermal origin from the Kovdor phoscorite - carbonatite complex, Russia The Canadian Mineralogist 38 831-838 |  | 2000 | Kovdor phoscorite - carbonatite complex, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.31 Å | (33) |
| 8.56 Å | (100) |
| 3.496 Å | (23) |
| 3.314 Å | (23) |
| 2.849 Å | (33) |
| 2.675 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 36 : Carbonatites, kimberlites, and related igneous rocks | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 49 : Oxic cellular biomineralization (see also #44) | <0.54 |
| 50 : Coal and/or oil shale minerals | <0.36 |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Bakhchisaraitsevite
General Appearance of Type Material:
Fan-shaped aggregates or as single bladed tabular crystals up to 0.5 × 1.5 × 2 mm.
Place of Conservation of Type Material:
Mining Museum of the Saint Petersburg Mining Institute, Russia, and at the Geological Museum of the University of Oulu, Finland.
Geological Setting of Type Material:
In voids within veins of vuggy dolomite carbonatite
Associated Minerals at Type Locality:
Reference:
Gehör, S., Bogdanova, A.N., Sorokhtima, N.V. (2000) Bakhchisaraitsevite, Na2Mg5[PO4]4·7H2O, a new mineral from hydrothermal assemblages related to phoscorite-carbonatite complex of the Kovdor massif, Russia. Neues Jahrbuch für Mineralogie, Monatshefte: 2000: 402-418.
Synonyms of Bakhchisaraitsevite
Other Language Names for Bakhchisaraitsevite
German:Bakhchisaraitsevit
Russian:Бахчисарайцевит
Simplified Chinese:水磷钠镁石
Spanish:Bakhchisaraitsevita
Traditional Chinese:水磷鈉鎂石
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.CH.05 | Walentaite | Fe3+3(P0.84As0.16O4)2(O,OH)6As3+2.56Ca0.42Na0.28Mn2+0.35Fe2+0.30O6.1(OH)0.9(H2O)0.9 |
| 8.CH.05 | Natrowalentaite | [Fe3+0.5Na0.5(H2O)6][NaAs3+2(Fe3+2.33W6+0.67)(PO4)2O7] |
| 8.CH.05 | Halilsarpite | [Mg(H2O)6][CaAs3+2(Fe3+2.67Mo6+0.33)(AsO4)2O7] |
| 8.CH.10 | Anapaite | Ca2Fe2+(PO4)2 · 4H2O |
| 8.CH.15 | Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
| 8.CH.20 | Dittmarite | (NH4)Mg(PO4) · H2O |
| 8.CH.20 | Niahite | (NH4)(Mn2+,Mg)(PO4) · H2O |
| 8.CH.25 | Francoanellite | K3Al5(PO3OH)6(PO4)2 · 12H2O |
| 8.CH.25 | Taranakite | (K,NH4)Al3(PO4)3(OH) · 9H2O |
| 8.CH.30 | Schertelite | (NH4)2MgH2(PO4)2 · 4H2O |
| 8.CH.35 | Hannayite | (NH4)2Mg3H4(PO4)4 · 8H2O |
| 8.CH.40 | Struvite | (NH4)Mg(PO4) · 6H2O |
| 8.CH.40 | Struvite-(K) | KMg(PO4) · 6H2O |
| 8.CH.40 | Hazenite | KNaMg2(PO4)2 · 14H2O |
| 8.CH.45 | Rimkorolgite | (Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2O |
| 8.CH.55 | Fahleite | CaZn5Fe3+2(AsO4)6 · 14H2O |
| 8.CH.55 | Smolyaninovite | Co3Fe3+2(AsO4)4 · 11H2O |
| 8.CH.60 | Barahonaite-(Al) | (Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2O |
| 8.CH.60 | Barahonaite-(Fe) | (Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2O |
| 8.CH.70 | Epifanovite | NaCaCu5(PO4)4[AsO2(OH)2] · 7H2O |
| 8.CH.75 | Esdanaite-(Ce) | NaMnCe(PO4)2 · 4H2O |
Fluorescence of Bakhchisaraitsevite
Not fluorescent
Other Information
Notes:
Soluble in 10% HCl
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 Bakhchisaraitsevite
mindat.org URL:
https://www.mindat.org/min-7074.html
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References for Bakhchisaraitsevite
Reference List:
Yakubovich, O. V., Massa, W., Liferovich, R. P., Pakhomovsky, Y. A. (2000) The crystal structure of bakhchisaraitsevite, [Na2(H2O)2]{(Mg4.5Fe0.5)(PO4)4(H2O)5}, a new mineral species of hydrothermal origin from the Kovdor phoscorite-carbonatite Complex, Russia. The Canadian Mineralogist, 38 (4) 831-838 doi:10.2113/gscanmin.38.4.831
Mandarino, Joseph A. (2001) New minerals. The Canadian Mineralogist, 39 (5) 1473-1502 doi:10.2113/gscanmin.39.5.1473
Localities for Bakhchisaraitsevite
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.
Chile | |
| Joy Desor material. EDS verified. Jason ... |
| XRD by Joachim Lorenz +1 other reference | |
Russia | |
| |
| Belovitskaya et al. (2004) +1 other reference |
| The Mineralogical Record +4 other references |
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Kovdor Zheleznyi Mine, Kovdor Massif, Kovdorsky District, Murmansk Oblast, Russia