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Proshchenkoite-(Y)

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Big Photo

Tommotskii Massif, Tommot river, Selennyakh range, Cherskii range system, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
© Thomas Witzke




Formula:
Ca(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
System:TrigonalColour:brownish to reddish
Hardness:5½
Name:
Named in honor of Dr. Evgeniy Grigor'evich Proshchenko (1929-1996), Russian mineralogist, who found the mineral. It was first described in 1966 as a REE-bearing fluorosilicate without a name, but first characterized as a new species by Raade et al. (2009)


Vicanite Group.

Classification of Proshchenkoite-(Y)

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID:9.AJ.35

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
Dana 8th edition ID:54.2.5.4

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
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Type Occurrence of Proshchenkoite-(Y)

Type Locality:Tommotskii Massif, Tommot river, Selennyakh range, Cherskii range system, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
Place of Conservation of Type Material:Natural History Museum, University of Oslo, catalogue number 42029.
Year of Discovery:1966
Geological Setting of type material:In pegmatites of syenitic to alkali granitic composition and also in the enclosing crystalline schists and aegirinized gneisses.
Associated Minerals at type locality:
GadolinitePyriteMolybdeniteFluoriteFergusonite
Chevkinite

Physical Properties of Proshchenkoite-(Y)

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:brownish to reddish
Comment:orangeyellow in thin fragments
Streak:light brown
Hardness (Mohs):5½
Hardness Data:Measured
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Conchoidal

Crystallography of Proshchenkoite-(Y)

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 10.7527Å, c = 27.4002Å
Ratio:a:c = 1 : 2.548
Unit Cell Volume:V 2,743.59 ų (Calculated from Unit Cell)

Chemical Properties of Proshchenkoite-(Y)

Formula:
Ca(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
Essential elements:B, Ca, F, Fe, O, P, Si, Y
All elements listed in formula:B, Ca, F, Fe, Mn, Na, O, P, Si, Y

Relationship of Proshchenkoite-(Y) to other Species

Structurally related to group(s):
Vicanite Group
Related Minerals - Nickel-Strunz Grouping):

- +
9.AJ.05Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
9.AJ.05Ominelite
(Fe
2+
 
,Mg)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
9.AJ.10Dumortierite
(Al,Fe
3+
 
)
 
7
(SiO
 
4
)
 
3
(BO
 
3
)O
 
3
9.AJ.10Holtite
Al
 
6
(Al,Ta)(SiO
 
4
,SbO
 
4
,AsO
 
4
)
 
3
(BO
 
3
)O
 
3
9.AJ.10Magnesiodumortierite
(Mg,Ti,◻(Al,Mg)
 
2
Al
 
4
Si
 
3
O
 
18-y
(OH)
 
y
B y = 2-3
9.AJ.15Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
9.AJ.20Bakerite
Ca
 
4
(H
 
5
B
 
5
Si
 
3
O
 
20
)
9.AJ.20Datolite
Ca(HBSiO
 
5
)
9.AJ.20Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
Si
 
2
O
 
10
9.AJ.20Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
Si
 
2
O
 
10
9.AJ.20Hingganite-(Ce)
(Ce,REE)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Y)
(Y,REE,Ca)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Yb)
(Yb,Y,REE)
 
2
□Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
Si
 
2
O
 
10
9.AJ.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F) · nH
 
2
O
9.AJ.20Minasgeraisite-(Y)
CaBe
 
2
Y
 
2
Si
 
2
O
 
10
9.AJ.20Calcybeborosilite-(Y)
(Y,Ca)
 
2
(□,Fe
2+
 
)(B,Be)
 
2
[SiO
 
4
]
 
2
(OH,O)
 
2
9.AJ.25Stillwellite-(Ce)
(Ce,La,Ca)BSiO
 
5
9.AJ.30Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
9.AJ.35Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
9.AJ.35Vicanite-(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
9.AJ.35Hundholmenite-(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
9.AJ.40Jadarite
LiNaSiB
 
3
O
 
7
(OH)

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 Proshchenkoite-(Y)

Reference List:

- +
Raade, G, Grice, J. D., Erambert, M., Kristiansson, P.and Witzke, T. (2008) Proshchenkoite-(Y) from Russia - a new mineral species in the vicanite group: Descriptive data and crystal structure. Mineralogical Magazine ,72, 1071-1082

Internet Links for Proshchenkoite-(Y)

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    • Localities for Proshchenkoite-(Y)

    Hide Locality List
    (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
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Polar Yakutia
          • Cherskii range system
            • Selennyakh range
              • Tommot river
    		Raade, G, Grice, J. D., Erambert, M., Kristiansson, P.and Witzke, T. (2008) Proshchenkoite-(Y) from Russia - a new mineral species in the vicanite group: Descriptive data and crystal structure. Mineralogical Magazine ,72, 1071-1082
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 04:02:42
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