Laptevite-(Ce)
This page is currently not sponsored. Click here to sponsor this page.
Formula:
Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11
Specific Gravity:
4.660 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
Tatyana Mikhailovna Lapteva (1928-2011), a Russian geologist and petrologist who worked on the geology of Central Asia and the REE cerium.
Type Locality:
Isostructural with:
Classification of Laptevite-(Ce)
Approved, Pending publication
Approval Year:
2011
Physical Properties of Laptevite-(Ce)
Density:
4.660 g/cm3 (Calculated)
Chemical Properties of Laptevite-(Ce)
Formula:
Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11
IMA Formula:
NaFe2+(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11
Crystallography of Laptevite-(Ce)
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 10.804(2) Å, c = 27.726(6) Å
Ratio:
a:c = 1 : 2.566
Unit Cell V:
2802.6 ų
Z:
3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.41 | (29) |
| 3.13 | (26) |
| 3.03 | (100) |
| 2.982 | (85) |
| 2.954 | (60) |
| 2.689 | (40) |
| 1.797 | (31) |
| 1.770 | (21) |
Type Occurrence of Laptevite-(Ce)
General Appearance of Type Material:
anhedral grains to 8mm
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4195/1
Geological Setting of Type Material:
hydrothermal mineral
Associated Minerals at Type Locality:
Synonyms of Laptevite-(Ce)
Other Language Names for Laptevite-(Ce)
Russian:Лаптевит-(Ce)
Relationship of Laptevite-(Ce) to other Species
Member of:
Other Members of this group:
| Hundholmenite-(Y) | (Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48 | Trig. 3m : R3m |
| Okanoganite-(Y) | (Na,Ca)3(Y,Ce)12Si6B2O27F14 | |
| Proshchenkoite-(Y) | Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14 | Trig. 3m : R3m |
| Vicanite-(Ce) | (Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7 | Trig. |
Common Associates
Associated Minerals Based on Photo Data:
| Astrophyllite | 5 photos of Laptevite-(Ce) associated with Astrophyllite on mindat.org. |
| Aegirine | 5 photos of Laptevite-(Ce) associated with Aegirine on mindat.org. |
| Bafertisite | 4 photos of Laptevite-(Ce) associated with Bafertisite on mindat.org. |
| Quartz | 3 photos of Laptevite-(Ce) associated with Quartz on mindat.org. |
Other Information
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 Laptevite-(Ce)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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)
mindat.org URL:
https://www.mindat.org/min-42866.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Laptevite-(Ce)
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Kyrgyzstan | |
| Atali A.Agakhanov and Leonid A.Pautov analytical data |
Tajikistan (TL) | |
| 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. |
Gere-Su river, Matcha massif, Zeravshan range, Osh Oblast, Kyrgyzstan