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Pectolite-M2abc

Formula:
NaCa
 
2
[HSi
 
3
O
 
9
]
A polytype of Pectolite

Electron diffraction patterns showed one pectolite sample from Rauschermühle, Germany, that gave a pattern like of "parawollastonite". The name parapectolite was suggested by Muller.
Michael Fleischer according to IMA recommendation (1962) about parawollastonite, change the name parapectolite in pectolite-M2abc.

The original pectolite-M2abc material came from Rauschermühle Quarry, Niederkirchen, Rhineland-Palatinate, Germany.

Classification of Pectolite-M2abc

Strunz 8th edition ID:8/F.18-61

8 : Silicates
F : Inosilicates (chain and band) double chains [Si2O6]4-
18 : Wollastonite-2M - Foshagite series
Hey's CIM Ref.:14.6.3

14 : Silicates not Containing Aluminum
6 : Silicates of Ca with alkali or Mg or both
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Chemical Properties of Pectolite-M2abc

Formula:
NaCa
 
2
[HSi
 
3
O
 
9
]
Essential elements:Ca, H, Na, O, Si
All elements listed in formula:Ca, H, Na, O, Si

Relationship of Pectolite-M2abc to other Species

Related Minerals - Strunz Grouping):

- +
8/F.18-10Wollastonite
Ca[SiO
 
3
]
8/F.18-30Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)[Si
 
2
O
 
6
]
8/F.18-40Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
8/F.18-45Vistepite
SnMn
 
4
B
 
2
Si
 
4
O
 
16
(OH)
 
2
8/F.18-50Cascandite
Ca(Sc,Fe
3+
 
)[HSi
 
3
O
 
9
]
8/F.18-60Pectolite
NaCa
 
2
[HSi
 
3
O
 
9
]
8/F.18-70Denisovite
Ca
 
2
(K,Na)Si
 
3
O
 
8
(F,OH)
 
2
8/F.18-80Sérandite
Na(Mn
2+
 
,Ca)
 
2
[HSi
 
3
O
 
9
]
8/F.18-90Foshagite
Ca
 
4
[(OH)
 
2
|Si
 
3
O
 
9
]
8/F.18-100Hillebrandite
Ca
 
2
[(OH)
 
2
|SiO
 
3
]
Related Minerals - Hey's Index Grouping:

- +
14.6.1Combeite
Na
 
2
Ca
 
2
Si
 
3
O
 
9
14.6.2Pectolite
NaCa
 
2
[HSi
 
3
O
 
9
]
14.6.4Denisovite
Ca
 
2
(K,Na)Si
 
3
O
 
8
(F,OH)
 
2
14.6.5Tokkoite
K
 
2
Ca
 
4
Si
 
7
O
 
17
(O,OH,F)
 
4
14.6.6Mountainite
KNa
 
2
Ca
 
2
[Si
 
8
O
 
19
(OH)]·6H
 
2
O
14.6.7Rhodesite
KHCa
 
2
Si
 
8
O
 
19
·5H
 
2
O
14.6.8Miserite
K(Ca,Ce)
 
4
Si
 
5
O
 
13
(OH)
 
3
14.6.9Åkermanite
Ca
 
2
Mg[Si
 
2
O
 
7
]
14.6.10Monticellite
CaMg[SiO
 
4
]
14.6.11Merwinite
Ca
 
3
Mg[SiO
 
4
]
 
2
14.6.12Diopside
CaMg[Si
 
2
O
 
6
]
14.6.13Tremolite
☐[Ca
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]

Other Names for Pectolite-M2abc

Other Languages:
Russian:Пектолит-M2abc

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 Pectolite-M2abc

Reference List:Muller, W.F. (1976): On stacking disorder and polytypism in pectolite and serandite. Z. Kristallogr., 144, 401-408.

Fleischer, M., Cabri, L.J., Chao, G.Y., Pabst, A. (1978): New mineral names. American Mineralogist, 63, 424-427 (abs).

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    Localities for Pectolite-M2abc

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    Germany
     
    • Rhineland-Palatinate
      • Niederkirchen
    		W.F.Muller (1976) - On stacking disorder and polytypism in pectolite and serandite. Z. Kristallogr., 144, 401-408
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