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Bakhchisaraitsevite

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About BakhchisaraitseviteHide

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 (Александра Юрьевича Бахчисарайцева) (1947–1998), crystallographer from the Geological Institute of the Kola Scientific Center of the Russian Academy of Sciences, Apatity.
Structurally related to rimkorolgite and liversidgeite.


Classification of BakhchisaraitseviteHide

Approved
First Published:
2000
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

Pronounciation of BakhchisaraitseviteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of BakhchisaraitseviteHide

Vitreous
Transparency:
Transparent
Colour:
Light yellow, colourless or greenish
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001} perfect
Density:
2.50(2) g/cm3 (Measured)    2.47 g/cm3 (Calculated)

Optical Data of BakhchisaraitseviteHide

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.
Surface Relief:
Low
Dispersion:
none

Chemical Properties of BakhchisaraitseviteHide

Formula:
Na2Mg5(PO4)4 · 7H2O

Crystallography of BakhchisaraitseviteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 8.32(1) Å, b = 12.90(2) Å, c = 17.50(3) Å
β = 102.0(1)°
Ratio:
a:b:c = 0.645 : 1 : 1.357
Unit Cell V:
1,837.20 ų (Calculated from Unit Cell)
Z:
4
Twinning:
None observed

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.31 Å(33)
8.56 Å(100)
3.496 Å(23)
3.314 Å(23)
2.849 Å(33)
2.675 Å(25)

Type Occurrence of BakhchisaraitseviteHide

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 BakhchisaraitseviteHide

Other Language Names for BakhchisaraitseviteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Bakhchisaraitsevite associated with DolomiteCaMg(CO3)2

Related Minerals - Nickel-Strunz GroupingHide

8.CH.05WalentaiteFe3+3(P0.84As0.16O4)2(O,OH)6As3+2.56Ca0.42Na0.28Mn2+0.35Fe2+0.30O6.1(OH)0.9(H2O)0.9Orth. mmm (2/m 2/m 2/m) : Imma
8.CH.10AnapaiteCa2Fe2+(PO4)2 · 4H2OTric. 1 : P1
8.CH.15PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2OTric. 1 : P1
8.CH.20Dittmarite(NH4)Mg(PO4) · H2OOrth.
8.CH.20Niahite(NH4)(Mn2+,Mg)(PO4) · H2OOrth. mm2 : Pmn21
8.CH.25FrancoanelliteK3Al5(PO4)2(HPO4)3 · 12H2OTrig.
8.CH.25Taranakite(K,NH4)Al3(PO4)3(OH) · 9H2OTrig. 3m (3 2/m) : R3c
8.CH.30Schertelite(NH4)2MgH2(PO4)2 · 4H2OOrth.
8.CH.35Hannayite(NH4)2Mg3H4(PO4)4 · 8H2OTric. 1 : P1
8.CH.40Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2
8.CH.40Struvite-(K)KMg(PO4)·6H2OOrth. mm2 : Pmn21
8.CH.40HazeniteKNaMg2(PO4)2 · 14H2OOrth. mm2
8.CH.45Rimkorolgite(Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2OOrth.
8.CH.55FahleiteCaZn5Fe3+2(AsO4)6 · 14H2OOrth.
8.CH.55SmolyaninoviteCo3Fe3+2(AsO4)4 · 11H2OOrth.
8.CH.60Barahonaite-(Al)(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2OMon. 2/m : P2/b
8.CH.60Barahonaite-(Fe)(Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2OMon. 2/m : P2/b

Fluorescence of BakhchisaraitseviteHide

Not fluorescent

Other InformationHide

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.

References for BakhchisaraitseviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Liferovich, R.P., Pakhomovsky, Y.A., Yakubovich, O.V., Massa, W., Laajoki, K., 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.
Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 767-770.
Mandarino, J.A. (2001) New minerals. The Canadian Mineralogist: 39: 1473-1502.
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.
Pekov, I.V. (2007) New minerals from former Soviet Union countries, 1998-2006: new minerals approved by the IMA commission on new minerals and mineral names. Mineralogical Almanac: 11: 9-51.
Kampf, A.R., Mills, S.J., Housley, R.M., Favreau, G., Boulliard, J.C., Bourgoin, V. (2012) Angarfite, NaFe3+5(PO4)4(OH)4·4H2O, a new mineral species from the Angarf-Sud pegmatite, Morocco: description and crystal structure. The Canadian Mineralogist: 50: 781-791.

Internet Links for BakhchisaraitseviteHide

Localities for BakhchisaraitseviteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile
 
  • Antofagasta
    • Antofagasta Province
      • Mejillones
Joy Desor material. EDS verified. Jason Smith collection
XRD by Joachim Lorenz SEM-EDS by Joy Desor
Russia
 
  • Chelyabinsk Oblast
    • Chelyabinsk coal basin
      • Korkino
  • Murmansk Oblast
New Data on Minerals (2004): 39: 50-64
[MinRec 32:413]; http://maurice.strahlen.org/kola/kovdor.htm; Yakovenchuk V N, Ivanyuk G Y, Mikhailova Y A, Selivanova E A, Krivovichev S V (2006) Pakhomovskyite, Co3(PO4)2·8H2O, a new mineral species from Kovdor, Kola Peninsula, Russia, The Canadian Mineralogist 44, 117-123
Mikhailova, J. A., Kalashnikov, A. O., Sokharev, V. A., Pakhomovsky, Y. A., Konopleva, N. G., Yakovenchuk, V. N., ... & Ivanyuk, G. Y. (2016). 3D mineralogical mapping of the Kovdor phoscorite–carbonatite complex (Russia). Mineralium Deposita, 51(1), 131-149.
 
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