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Penkvilksite

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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada

Show Penkvilksite Photos (8)
Formula:
Na
 
4
Ti
 
2
Si
 
8
O
 
22
·4H
 
2
O
System:OrthorhombicColour:White
Hardness:5
This page provides mineralogical data about Penkvilksite.

Classification of Penkvilksite

IMA status:Approved
Strunz 8th edition ID:8/F.34-30
Nickel-Strunz 10th (pending) edition ID:9.EA.60

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
Dana 8th edition ID:70.2.2.1

70 : INOSILICATES Column or Tube Structures
2 : Column or Tube Structures with Si2O7 dimers
Hey's CIM Ref.:14.10.28

14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
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Type Occurrence of Penkvilksite

Type Locality:Yubileinaya (Yubileinoye; Jubilejnaja) pegmatite, Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Physical Properties of Penkvilksite

Lustre:Silky, Pearly, Dull
Diaphaneity (Transparency):Opaque
Colour:White
Hardness (Mohs):5

Crystallography of Penkvilksite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbcn {P21/b 2/c 21/n}
Cell Parameters:a = 16.3721(5) Å, b = 8.7492(3) Å, c = 7.4020(2) Å
Ratio:a:b:c = 1.871 : 1 : 0.846
Unit Cell Volume:V 1,060.28 ų (Calculated from Unit Cell)

Optical Data of Penkvilksite

Type:Biaxial (+)
RI values: nα = 1.640 nβ = 1.646 nγ = 1.675
2V:Measured: 50° , Calculated: 50°
Maximum Birefringence:δ = 0.035

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively weak

Chemical Properties of Penkvilksite

Formula:
Na
 
4
Ti
 
2
Si
 
8
O
 
22
·4H
 
2
O
Essential elements:H, Na, O, Si, Ti
All elements listed in formula:H, Na, O, Si, Ti

Relationship of Penkvilksite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
[(F,OH)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
[(OH,F)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
[F|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
·3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
]·3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
·2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
)·2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
[(OH)
 
6
|AlSi
 
9
O
 
24
] · 3H
 
2
O
9.EA.75Zeravshanite
Cs
 
4
Na
 
2
Zr
 
3
[Si
 
18
O
 
45
](H
 
2
O)
 
2
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4
9.EA.85Plumbophyllite
Pb
 
2
Si
 
4
O
 
10
·H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.10.1Zircon
Zr[SiO
 
4
]
14.10.2Hafnon
(Hf,Zr)[SiO
 
4
]
14.10.3Zektzerite
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
14.10.4Parakeldyshite
Na
 
2
ZrSi
 
2
O
 
7
14.10.5Vlasovite
Na
 
2
ZrSi
 
4
O
 
11
14.10.6Keldyshite
(Na,H)
 
2
ZrSi
 
2
O
 
7
14.10.7Gaidonnayite
Na
 
2
Zr[Si
 
3
O
 
9
]·2H
 
2
O
14.10.8Terskite
Na
 
4
ZrSi
 
6
O
 
16
·2H
 
2
O
14.10.9Elpidite
Na
 
2
ZrSi
 
6
O
 
15
·3H
 
2
O
14.10.10Hilairite
Na
 
2
Zr[SiO
 
3
]
 
3
·3H
 
2
O
14.10.11Petarasite
Na
 
5
Zr
 
2
[(OH,Cl)|Si
 
6
O
 
18
]·2H
 
2
O
14.10.12Khibinskite
K
 
2
ZrSi
 
2
O
 
7
14.10.13Wadeite
K
 
2
Zr[Si
 
3
O
 
9
]
14.10.14Dalyite
K
 
2
ZrSi
 
6
O
 
15
14.10.15Kostylevite
K
 
2
ZrSi
 
3
O
 
9
·H
 
2
O
14.10.16Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
·H
 
2
O
14.10.17Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
·nH
 
2
O
14.10.18Georgechaoite
NaKZr[Si
 
3
O
 
9
]·2H
 
2
O
14.10.19Gittinsite
CaZr[Si
 
2
O
 
7
]
14.10.20Calciocatapleiite
CaZrSi
 
3
O
 
9
·2H
 
2
O
14.10.21Calciohilairite
CaZr[SiO
 
3
]
 
3
·3H
 
2
O
14.10.22Armstrongite
CaZr[Si
 
6
O
 
15
]·3H
 
2
O
14.10.23Lemoynite
(Na,K)
 
2
CaZr
 
2
Si
 
10
O
 
26
·5H
 
2
O
14.10.24Catapleiite
Na
 
2
Zr[Si
 
3
O
 
9
]·2H
 
2
O
14.10.25Baghdadite
Ca
 
3
(Zr,Ti)[O
 
2
|Si
 
2
O
 
7
]
14.10.26Lovozerite
Na
 
2
Ca(Zr,Ti)[Si
 
6
O
 
12
(OH,O)
 
6
]*H
 
2
O
14.10.27Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)[(O,OH,F)
 
2
|Si
 
2
O
 
7
]
14.10.29Darapiosite
KNa
 
2
Li(Mn,Zn)
 
2
ZrSi
 
12
O
 
30
14.10.30Bazirite
BaZr[Si
 
3
O
 
9
]
14.10.31Komkovite
BaZr[Si
 
3
O
 
9
]·3H
 
2
O
14.10.32Zirsinalite
Na
 
6
(Ca,Mn
2+
 
,Fe
2+
 
)Zr[Si
 
6
O
 
18
]
14.10.33Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
[O
 
4
|SiO
 
4
]
 
3

Other Names for Penkvilksite

Synonyms:
Unnamed (MSH UK-41)
Other Languages:
German:Penkvilksit
Russian:Пенквилксит
Spanish:Penkvilksita

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 Penkvilksite

Reference List:Bussen, I.V., et al.: Penkvilksite, a new hydrous silicate of titanium and sodium. Dokl. Akad. Nauk SSSR 217,1161-1164(1974)[American Mineralogist (1975): 60: 340-341, abstract][English translation: Doklady Earth Science Section 217,126-129 (1975)]

Merlino S., Pasero M., Artioli G., Khomyakov A.P.(1994): Penkvilksite, a new silicate structure: OD character, X-ray single crystal (1M) and powder Rietveld (2O) refinements of two MDO polytypes. American Mineralogist: 79: 1185-1193.

Subbotin, V.V., et al.: Tumchaite - a new mineral from carbonatites of the Vuoriyarvi alkali-ultrabasic massif, Murmansk Region, Russia.American Mineralogist (2000): 85: 1516.

Cadoni, M. & Ferraris, G. (2008): Penkvilskite-2O: Na2TiSi4O11·2H2O. Acta Crystallographica, C64, i87-i90.

Internet Links for Penkvilksite

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    Localities for Penkvilksite

    Hide Locality List
    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.
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Karnasurt Mt
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
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