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Chkalovite

Big Photo

Pegmatite No. 60, Second Eastern Stream, Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Pavel M. Kartashov

Show Chkalovite Photos (7)
Formula:
Na
 
2
BeSi
 
2
O
 
6
System:OrthorhombicColour:White
Hardness:6
Name:
For Valery Pavlovich Chkalov (1904-1938), Russian aviator.
This page provides mineralogical data about Chkalovite.

Classification of Chkalovite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/J.04-10
Nickel-Strunz 10th (pending) edition ID:9.DM.20

9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
Dana 8th edition ID:65.5.2.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
5 : Single-Width Unbranched Chains, W=1 with chains P=6
Hey's CIM Ref.:14.3.5

14 : Silicates not Containing Aluminum
3 : Silicates of Be
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Type Occurrence of Chkalovite

Type Locality:Malyi Punkaruaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1938
Geological Setting of type material:Pegmatite in alkalic massif

Physical Properties of Chkalovite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:White
Hardness (Mohs):6
Tenacity:Brittle
Cleavage:Imperfect/Fair
Fair in one direction, indistinct in two other directions
Fracture:Irregular/Uneven, Conchoidal
Density (measured):2.662 g/cm3
Density (calculated):2.70 g/cm3

Crystallography of Chkalovite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Fdd2
Cell Parameters:a = 21.129Å, b = 6.881Å, c = 21.185Å
Ratio:a:b:c = 3.071 : 1 : 3.079
Unit Cell Volume:V 3,080.06 ų (Calculated from Unit Cell)
Z:24
Morphology:Complex equant crystals, massive

Optical Data of Chkalovite

Type:Biaxial (+)
RI values: nα = 1.544 nβ = 1.546 nγ = 1.549
2V:Measured: 78° , Calculated: 80°
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:noticable

Chemical Properties of Chkalovite

Formula:
Na
 
2
BeSi
 
2
O
 
6
Essential elements:Be, Na, O, Si
All elements listed in formula:Be, Na, O, Si
Common Impurities:Fe,Ca,K,S

Relationship of Chkalovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DM.05Stokesite
CaSn[Si
 
3
O
 
9
] · 2H
 
2
O
9.DM.10Calciohilairite
CaZr[SiO
 
3
]
 
3
·3H
 
2
O
9.DM.10Hilairite
Na
 
2
Zr[SiO
 
3
]
 
3
·3H
 
2
O
9.DM.10Komkovite
BaZr[Si
 
3
O
 
9
]·3H
 
2
O
9.DM.10Sazykinaite-(Y)
Na
 
5
YZr[SiO
 
3
]
 
6
 · 6H
 
2
O
9.DM.10Pyatenkoite-(Y)
Na
 
5
YTi[SiO
 
3
]
 
6
 · 6H
 
2
O
9.DM.15Gaidonnayite
Na
 
2
Zr[Si
 
3
O
 
9
]·2H
 
2
O
9.DM.15Georgechaoite
NaKZr[Si
 
3
O
 
9
]·2H
 
2
O
9.DM.25Vlasovite
Na
 
2
ZrSi
 
4
O
 
11
9.DM.30Revdite
Na
 
16
Si
 
16
O
 
27
(OH)
 
26
·28H
 
2
O
9.DM.35Scheuchzerite
Na(Mn,Mg,Zn)
 
9
[VSi
 
9
O
 
28
(OH)](OH)
 
3
9.DM.40Terskite
Na
 
4
ZrSi
 
6
O
 
16
·2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.3.1Phenakite
Be
 
2
[SiO
 
4
]
14.3.2Bertrandite
Be
 
4
[(OH)
 
2
|Si
 
2
O
 
7
]
14.3.3Beryllite
Be
 
3
[(OH)
 
2
|SiO
 
4
] · H
 
2
O
14.3.4Liberite
Li
 
2
Be[SiO
 
4
]
14.3.6Eudidymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
14.3.7Epididymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
14.3.8Gugiaite
Ca
 
2
Be[Si
 
2
O
 
7
]
14.3.9Jeffreyite
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(O,OH)]
14.3.10Semenovite-(Ce)
Na
 
8
Ca
 
2
FeBe
 
6
Ce
 
2
Si
 
14
O
 
40
(OH)
 
4
F
 
4
14.3.11Barylite
BaBe
 
2
[Si
 
2
O
 
7
]
14.3.12Hingganite-(Ce)
(Ce,REE)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
14.3.13Hingganite-(Yb)
(Yb,Y,REE)
 
2
□Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
14.3.14Hingganite-(Y)
(Y,REE,Ca)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
14.3.15Minasgeraisite-(Y)
Y
 
2
CaBe
 
2
[O|SiO
 
4
]
 
2
14.3.16Sørensenite
Na
 
4
SnBe
 
2
Si
 
6
O
 
16
(OH)
 
4
14.3.17Trimerite
CaMn
2+
2
Be
 
3
[SiO
 
4
]
 
3
14.3.18Chiavennite
CaMnBe
 
2
Si
 
5
O
 
13
(OH)
 
2
·2H
 
2
O
14.3.19Tvedalite
(Ca,Mn)
 
4
Be
 
3
Si
 
6
O
 
17
(OH)
 
4
·3H
 
2
O
14.3.20Harstigite
Ca
 
6
(Mn,Mg)Be
 
4
Si
 
6
(O,OH)
 
24
14.3.21Sverigeite
NaMnMgSnBe
 
2
Si
 
3
O
 
12
(OH)
14.3.22Joesmithite
PbCa
 
2
Mg
 
3
Fe
3+
2
[Si
 
6
Be
 
2
O
 
22
](OH)
 
2
14.3.23Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
14.3.24Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
14.3.25Calciogadolinite-(Y)
(YCa)
 
2
Fe
3+
 
Be
 
2
[SiO
 
4
]
 
2
O
 
2

Other Names for Chkalovite

Other Languages:
German:Chkalovit
Russian:Чкаловит
Spanish:Chkalovita

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 Chkalovite

Reference List:American Mineralogist: 25: 380.

Soviet Physics – Doklady: 20: 805-807.

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    Localities for Chkalovite

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