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Petarasite

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Formula:
Na
 
5
Zr
 
2
(Si
 
6
O
 
18
)(Cl,OH) · 2H
 
2
O
System:MonoclinicColour:Orange to brown
Hardness:5 - 5½
Name:Named in 1980 by George Y. Chao, T. T. Chen, and J. Baker in honor of Dr. Peter Tarassoff [b. April 11, 1934 Canada] of Beaconsfield, Quebec, considered to be “the dean” of Mont Saint-Hilaire mineral collectors, for his long (40+ years) and sustained contributions to Mont Saint-Hilaire mineralogy.


Related to the Lovozerite Group.

Classification of Petarasite

IMA status:Approved
Strunz 8th edition ID:8/E.16-70
Nickel-Strunz 10th (pending) edition ID:9.CJ.40

9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
Dana 8th edition ID:61.1.2b.3

61 : CYCLOSILICATES Six-Membered Rings
1 : Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Hey's CIM Ref.:14.10.11

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

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Year of Discovery:1980

Physical Properties of Petarasite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Orange to brown
Hardness (Mohs):5 - 5½

Crystallography of Petarasite

Crystal System:Monoclinic
Cell Parameters:a = 10.79Å, b = 14.49Å, c = 6.62Å
β = 113.21°
Ratio:a:b:c = 0.745 : 1 : 0.457
Unit Cell Volume:V 951.25 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Petarasite

Type:Biaxial (+)
RI values: nα = 1.595 - 1.596 nβ = 1.598 - 1.600 nγ = 1.631 - 1.632
2V:Measured: 29° to 43°, Calculated: 36° to 40°
Maximum Birefringence:δ = 0.036

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

Chemical Properties of Petarasite

Formula:
Na
 
5
Zr
 
2
(Si
 
6
O
 
18
)(Cl,OH) · 2H
 
2
O
Simplified for copy/paste:Na5Zr2(Si6O18)(Cl,OH)·2H2O
Essential elements:Cl, H, Na, O, Si, Zr
All elements listed in formula:Cl, H, Na, O, Si, Zr
Common Impurities:Ti,Ca,K

Relationship of Petarasite to other Species

Chemically related to group(s):
Lovozerite Group
A
 
3
D
 
3
G
 
2
M(H
 
x
Si
 
6
O
 
18
) · nH
 
2
O (x = 0-6)
Related Minerals - Nickel-Strunz Grouping):

- +
9.CJ.05Bazzite
Be
 
3
Sc
 
2
(Si
 
6
O
 
18
)
9.CJ.05Beryl
Be
 
3
Al
 
2
(Si
 
6
O
 
18
)
9.CJ.05Indialite
Mg
 
2
Al
 
3
(AlSi
 
5
O
 
18
)
9.CJ.05Stoppaniite
Be
 
3
Fe
3+
2
(Si
 
6
O
 
18
) · H
 
2
O
9.CJ.10Cordierite
(Mg,Fe)
 
2
Al
 
3
(AlSi
 
5
O
 
18
)
9.CJ.10Sekaninaite
(Fe,Mg)
 
2
Al
 
3
(AlSi
 
5
O
 
18
)
9.CJ.15aCombeite
Na
 
2
Ca
 
2
(Si
 
6
O
 
18
)
 
0.5
9.CJ.15bImandrite
Na
 
12
Ca
 
3
Fe
3+
2
(Si
 
6
O
 
18
)
 
2
9.CJ.15aKazakovite
Na
 
6
Mn
2+
 
Ti(Si
 
6
O
 
18
)
9.CJ.15cKoashvite
Na
 
6
(Ca,Mn)(Ti,Fe)Si
 
6
O
 
18
· H
 
2
O
9.CJ.15aLovozerite
Na
 
2
Ca(Zr,Ti)(Si
 
6
O
 
12
)[(OH)
 
4
O
 
2
] · H
 
2
O
9.CJ.15aTisinalite
Na
 
3
H
 
3
(Mn,Ca,Fe)TiSi
 
6
(O,OH)
 
18
· 2H
 
2
O
9.CJ.15aZirsinalite
Na
 
6
(Ca,Mn
2+
 
,Fe
2+
 
)Zr(Si
 
6
O
 
18
)
9.CJ.15aLitvinskite
Na
 
2
(◻,Na,Mn)ZrSi
 
6
O
 
12
(OH,O)
 
6
9.CJ.15aKapustinite
Na
 
5
(Na,Mn
2+
 
)
 
<1
Zr(H
 
2
Si
 
6
O
 
18
)
9.CJ.25Baratovite
KCa
 
7
(Ti,Zr)
 
2
Li
 
3
Si
 
12
O
 
36
F
 
2
9.CJ.25Katayamalite
KCa
 
7
Ti
 
2
Li
 
3
Si
 
12
O
 
36
(OH)
 
2
9.CJ.25Aleksandrovite
KCa
 
7
Sn
 
2
Li
 
3
Si
 
12
O
 
36
F
 
2
9.CJ.30Dioptase
CuSiO
 
3
· H
 
2
O
9.CJ.35Kostylevite
K
 
2
Zr(Si
 
3
O
 
9
) · H
 
2
O
9.CJ.45Gerenite-(Y)
(Ca,Na)
 
2
(Y,REE)
 
3
Si
 
6
O
 
18
· 2H
 
2
O
9.CJ.50Odintsovite
K
 
2
Na
 
4
Ca
 
3
Ti
 
2
Be
 
4
Si
 
12
O
 
38
9.CJ.55Mathewrogersite
Pb
 
7
FeAl
 
3
GeSi
 
12
O
 
36
(OH,H
 
2
O)
 
6
9.CJ.60Pezzottaite
Cs(Be
 
2
Li)Al
 
2
(Si
 
6
O
 
18
)
Related Minerals - Hey's Index Grouping:

- +
14.10.1Zircon
ZrSiO
 
4
14.10.2Hafnon
HfSiO
 
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
14.10.12Khibinskite
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
Zr(Si
 
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
CaZrSi
 
2
O
 
7
14.10.20Calciocatapleiite
CaZr(Si
 
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)(Si
 
2
O
 
7
)O
 
2
14.10.26Lovozerite
Na
 
2
Ca(Zr,Ti)(Si
 
6
O
 
12
)[(OH)
 
4
O
 
2
] · H
 
2
O
14.10.27Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
14.10.28Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
· 4H
 
2
O
14.10.29Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
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
(SiO
 
4
)
 
3
O
 
4

Other Names for Petarasite

Synonyms:
IMA1979-063
Other Languages:
German:Petarasit
Russian:Петарасит
Spanish:Petarasita

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 Petarasite

Reference List:

- +
CHAO, G.Y., CHEN, T.T., and BAKER, J. (1980) Petarasite, a new hydrated sodium zirconium hydroxychlorosilicate mineral from Mont St Hilaire, Quebec. Canadian Mineralogist, 18, 497 502.

GHOSE, S., WAN CHENG, and CHAO, G.Y. (1980) Petarasite, Na5Zr2Si6O18(Cl,OH).2H2O a zeolite type zirconosilicate. Canadian Mineralogist, 18, 503 509.

PERRAULT, G., CHAO, G.Y., and CHEN, T.T. (1981) Additional data on petarasite from Mont St. Hilaire, Quebec. Canadian Mineralogist, 19, 411 413.

KHOMYAKOV, A.P., KUROVA, T.A., SHUMYATSKAYA, N.G., VORONKOV, A.A., and PYATENKO, Yu.a. (1981) On a new natural zirconosilicate Na5Zr2[Si6O18]Cl•2H2O and its crystal structure. Doklady Akademii Nauk SSSR., 257, 622-624. (in Russian) [petarasite]

HORVÁTH, L. (2003) Who’s who in mineral names: Peter Tarassoff (petarasite). Rocks & Minerals, 81, 141-143.

Lin, Z., Domingues, J.P., Rocha, J., Carlos, L.D. (2007): A zirconosilicate system suitable for lanthanide framework incorporation. Journal of Luminescence 122-123, 902-904.

Internet Links for Petarasite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Petarasite details from Handbook of Mineralogy (PDF)
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    Localities for Petarasite

    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
        • La Vallée-du-Richelieu RCM
          • Mont Saint-Hilaire
    Chao, G.Y. and Chen, T.T. (1980), Petarasite, a new hydrated sodium zirconium hydroxylchlorosilicate mineral from Mont St. Hilaire, Quebec. Canadian Mineralogist: 18: 497-502; Perrault, G., Chao G.Y. and Chen T.T. (1981), Additional data on petarasite from Mont St. Hilaire, Quebec. Canadian Mineralogist: 19: 411-413.
    Norway
     
    • Vestfold
      • Larvik
        • Malerød
    Larsen, A.O. (ed.) (2010): "The Langesundsfjord, History, Geology, Pegmatites, Minerals" , Bode Verlag GmBH.;Andresen, P. (2011): Mineralene fra Midtfjellet larvikittbrudd, Malerød, Larvik. Norsk Bergverksmuseum Skrift. 46: 41-47
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Kukisvumchorr Mt
              • East slope
                • Tuliok River head
    Pavel M. Kartashov data
    Хомяков А.П., Курова Т.Ф., Шумяцкая Р.Г. и др. (1981) О новом цирконосиликате Na5Zr2[Si6O18]Clx2H2O и его кристаллической структуре,- ДАН СССРб т.257, №3, с. 622-624.
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    USA
     
    • New Mexico
      • Otero Co.
        • Cornudas Mts
    Dr. W. Stoll (private communication 2001 & 2004)
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