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Laptevite-(Ce)

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Formula:
Ca
 
6
(Fe
2+
 
,Mn
2+
 
)Y
 
3
REE
 
7
(SiO
 
4
)
 
3
(PO
 
4
)(B
 
3
Si
 
3
O
 
18
)(BO
 
3
)F
 
11
System:Trigonal
Member of:Vicanite Group


Structurally related to the Vicanite Group (e.g. Okanoganite-(Y)).

Classification of Laptevite-(Ce)

IMA status:Approved 2011
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Type Occurrence of Laptevite-(Ce)

Type Locality:Darai-Pioz Glacier (Dara-i-Pioz; Dara-Pioz), Alai Range (Alayskiy), Tien Shan Mtn, Region of Republican Subordination, Tajikistan
Place of Conservation of Type Material:Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4195/1

Crystallography of Laptevite-(Ce)

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 10.804(2) Å, c = 27.726(6) Å
Ratio:a:c = 1 : 2.566
Unit Cell Volume:V 2,802.77 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.41(29)
3.13(26)
3.03(100)
2.982(85)
2.954(60)
2.689(40)
1.797(31)
1.770(21)

Chemical Properties of Laptevite-(Ce)

Formula:
Ca
 
6
(Fe
2+
 
,Mn
2+
 
)Y
 
3
REE
 
7
(SiO
 
4
)
 
3
(PO
 
4
)(B
 
3
Si
 
3
O
 
18
)(BO
 
3
)F
 
11
Simplified for copy/paste:Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11
Essential elements:B, Ca, F, Fe, O, P, Si, Y
All elements listed in formula:B, Ca, F, Fe, Mn, O, P, Si, Y

Relationship of Laptevite-(Ce) to other Species

Member of:Vicanite Group
Other Members of Group:

- +
Hundholmenite-(Y)
(Y,REE,Ca,Na)
 
15
(Al,Fe
3+
 
)(Ca
 
x
As
3+
1-x
)(Si,As
5+
 
)Si
 
6
B
 
3
(O,F)
 
48
Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
Proshchenkoite-(Y)
Ca(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
Vicanite-(Ce)
(Ca,Ce,La,Th)
 
15
As
5+
 
(As
3+
0.5
,Na
 
0.5
)Fe
3+
 
Si
 
6
B
 
4
O
 
40
F
 
7

Other Names for Laptevite-(Ce)

Synonyms:
IMA2011-081
Other Languages:
Russian:Лаптевит-(Ce)

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 Laptevite-(Ce)

Reference List:

- +
Agakhanov, A.A., Pautov, L.A., Uvarova, Y., Karpenko, V.Y., Sokolova, E.V. and Hawthorne, F.C. (2012): Laptevite-(Ce), IMA 2011-081. CNMNC Newsletter No. 12, February 2012, page 153; Mineralogical Magazine, 76, 151-155.

Uvarova, Y.A., Sokolova, E., Hawthorne, F.C., Agakhanov, A.A., Karpenko, V.Y., Pautov, L.A. (2013): The crystal structure of laptevite-(Ce), NaFe2+(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11, a new mineral species from the Darai-Pioz alkaline massif, Northern Tajikistan. Zeitschrift für Kristallographie - Crystalline Materials, 228, 550-557.

Internet Links for Laptevite-(Ce)

Search Engines:
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  • Localities for Laptevite-(Ce)

    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.
    Kyrgyzstan
     
    • Osh Oblast
      • Zeravshan range
        • Matcha massif
    Atali A.Agakhanov and Leonid A.Pautov analytical data
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mtn
        • Alai Range (Alayskiy)
    Agakhanov, A.A., Pautov, L.A., Uvarova, Y., Karpenko, V.Y., Sokolova, E.V. and Hawthorne, F.C. (2012): Laptevite-(Ce), IMA 2011-081. CNMNC Newsletter No. 12, February 2012, page 153; Mineralogical Magazine, 76, 151-155; Uvarova, Y.A., Sokolova, E., Hawthorne, F.C., Agakhanov, A.A., Karpenko, V.Y., Pautov, L.A. (2013): The crystal structure of laptevite-(Ce), NaFe2+(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11, a new mineral species from the Darai-Pioz alkaline massif, Northern Tajikistan. Zeitschrift für Kristallographie - Crystalline Materials, 228, 550-557.
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