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Bakhchisaraitsevite

Formula:
Na
 
2
Mg
 
5
(PO
 
4
)
 
4
·7H
 
2
O
System:MonoclinicColour:Light yellow, colourless ...
Lustre:VitreousHardness:2 - 2½
Name:For Alexander Yu. Bakhchisaraitsev (1947-1998)


Structurally related to rimkorolgite and IMA2008-048.

Classification of Bakhchisaraitsevite

IMA status:Approved
Nickel-Strunz 10th (pending) edition ID: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
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Type Occurrence of Bakhchisaraitsevite

Type Locality:Kovdor Mine, Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Physical Properties of Bakhchisaraitsevite

Lustre:Vitreous
Colour:Light yellow, colourless or greenish
Streak:White
Hardness (Mohs):2 - 2½

Crystallography of Bakhchisaraitsevite

Crystal System:Monoclinic

Optical Data of Bakhchisaraitsevite

Type:Biaxial (+)
RI values: nα = 1.538 nβ = 1.540 nγ = 1.543
Maximum Birefringence:δ = 0.005

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Bakhchisaraitsevite

Formula:
Na
 
2
Mg
 
5
(PO
 
4
)
 
4
·7H
 
2
O
Essential elements:H, Mg, Na, O, P
All elements listed in formula:H, Mg, Na, O, P

Relationship of Bakhchisaraitsevite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CH.05Walentaite
H(Ca,Mn
2+
 
,Fe
2+
 
)Fe
3+
3
[(AsO
 
4
,PO
 
4
)]
 
4
· 7H
 
2
O
8.CH.10Anapaite
Ca
 
2
Fe
2+
 
[PO
 
4
]
 
2
· 4H
 
2
O
8.CH.15Picropharmacolite
Ca
 
4
Mg[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 11H
 
2
O
8.CH.20Dittmarite
NH
 
4
MgPO
 
4
·H
 
2
O
8.CH.20Niahite
(NH
 
4
)(Mn
2+
 
,Mg)[PO
 
4
] · H
 
2
O
8.CH.25Francoanellite
K
 
3
Al
 
5
[(HPO
 
4
)
 
3
|PO
 
4
]
 
2
· 12H
 
2
O
8.CH.25Taranakite
(K,NH
 
4
)Al
 
3
(PO
 
4
)
 
3
OH·9H
 
2
O
8.CH.30Schertelite
(NH
 
4
)
 
2
MgH
 
2
(PO
 
4
)
 
2
·4H
 
2
O
8.CH.35Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
·8H
 
2
O
8.CH.40Struvite
NH
 
4
MgPO
 
4
·6H
 
2
O
8.CH.40Struvite-(K)
KMg(PO
 
4
)·6H
 
2
O
8.CH.40Hazenite
KNaMg
 
2
(PO
 
4
)
 
2
·14H
 
2
O
8.CH.45Rimkorolgite
(Mg,Mn)
 
5
(Ba,Sr,Ca)(PO
 
4
)
 
4
·8H
 
2
O
8.CH.55Fahleite
Zn
 
5
CaFe
 
2
(AsO
 
4
)
 
6
·14H
 
2
O
8.CH.55Smolyaninovite
8.CH.55Smolianinovite
(Co,Ni,Mg,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(AsO
 
4
)
 
4
·11H
 
2
O
8.CH.60Barahonaite-(Al)
(Ca,Cu,Na,Fe
3+
 
,Al)
 
12
Al
 
2
(AsO
 
4
)
 
8
(OH,Cl)
 
x
·nH
 
2
O
8.CH.60Barahonaite-(Fe)
(Ca,Cu,Na,Fe
3+
 
,Al)
 
12
Fe
3+
2
(AsO
 
4
)
 
8
(OH,Cl)
 
x
·nH
 
2
O

Other Names for Bakhchisaraitsevite

Synonyms:
IMA1999-005
Other Languages:
German:Bakhchisaraitsevit
Russian:Бахчисарайцевит
Spanish:Bakhchisaraitsevita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Bakhchisaraitsevite

Reference List:Neues Jahrbuch für Mineralogie, Monatshefte (2000): 402-418.

Canadian Mineralogist: 38: 831-838.

Internet Links for Bakhchisaraitsevite

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    Localities for Bakhchisaraitsevite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Kovdor Massif
    [MinRec 32:413]
    http://maurice.strahlen.org/kola/kovdor.htm
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Chelyabinsk coal basin
            • Korkino
    Mineral and/or Locality
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