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Gobbinsite

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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
© Stephan Wolfsried

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Formula:
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
·12H
 
2
O
System:OrthorhombicHardness:4
This page provides mineralogical data about Gobbinsite.

Classification of Gobbinsite

IMA status:Approved
Strunz 8th edition ID:8/J.25-30
Nickel-Strunz 10th (pending) edition ID:9.GC.05

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings
Dana 8th edition ID:77.1.3.4

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
Hey's CIM Ref.:16.10.20

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
mindat.org URL:http://www.mindat.org/min-1715.html
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Type Occurrence of Gobbinsite

Type Locality:Two Mouthed cave, Hills Port, Gobbins, Magee Island, Co. Antrim, Northern Ireland, UK
Year of Discovery:1982

Physical Properties of Gobbinsite

Hardness (Mohs):4

Crystallography of Gobbinsite

Crystal System:Orthorhombic
Cell Parameters:a = 9.8Å, b = 10.15Å, c = 10.1Å
Ratio:a:b:c = 0.966 : 1 : 0.995
Unit Cell Volume:V 1,004.65 ų (Calculated from Unit Cell)

Optical Data of Gobbinsite

Type:Biaxial (-)
RI values: nα = 1.489 nβ = 1.489 nγ = 1.494
Maximum Birefringence:δ = 0.005

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Gobbinsite

Formula:
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
·12H
 
2
O
Essential elements:Al, Ca, H, Na, O, Si
All elements listed in formula:Al, Ca, H, K, Mg, Na, O, Si
Common Impurities:Fe,Sr,Ba

Relationship of Gobbinsite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.GC.05Amicite
K
 
2
Na
 
2
Al
 
4
Si
 
4
O
 
16
·5H
 
2
O
9.GC.05Garronite
Na
 
2
Ca
 
5
Al
 
12
Si
 
20
O
 
64
·27H
 
2
O
9.GC.05Gismondine-Ca
CaAl
 
2
Si
 
2
O
 
8
·4H
 
2
O
9.GC.05Gismondine
Ca[Al
 
2
Si
 
2
O
 
8
]·4.5H
 
2
O
9.GC.10Harmotome
(Ba
 
0.5
,Ca
 
0.5
,K,Na)
 
5
[Al
 
5
Si
 
11
O
 
32
] ·12H
 
2
O
9.GC.10Phillipsite-Ca
(Ca
 
0.5
,K,Na,Ba
 
0.5
)
 
4-7
[Al
 
4-7
Si
 
12-9
O
 
32
.
 
 12H2O
9.GC.10Phillipsite-K
(K,Na,Ca
 
0.5
,Ba
 
0.5
)
 
4-7
[Al
 
4-7
Si
 
12-9
O
 
32
]
.
 
 12H
 
2
O
9.GC.10Phillipsite-Na
(Na,K,Ca
 
0.5
,Ba
 
0.5
)
 
4-7
[Al
 
4-7
Si
 
12-9
O
 
32
] · 12H
 
2
O
9.GC.15Merlinoite
(K,Na)
 
5
(Ca,Ba)
 
2
Al
 
9
Si
 
23
O
 
64
·23H
 
2
O
9.GC.20Mazzite-Mg
K
 
2
Mg
 
2
Ca
 
1.5
Al
 
9.5
Si
 
26.5
O
 
72
·28H
 
2
O or near
9.GC.20Mazzite-Na
Na
 
4
[Al
 
4
Si
 
14
O
 
36
]
 
2
 · 30H
 
2
O
9.GC.25Perlialite
K
 
9
Na(Ca,Sr)[Al
 
2
Si
 
4
O
 
12
]
 
6
 · 15H
 
2
O
9.GC.30Boggsite
Ca
 
8
Na
 
3
(Si,Al)
 
96
O
 
192
·70H
 
2
O
9.GC.35Paulingite-Ca
(Ca,K
 
2
,Na
 
2
,Ba)
 
5
[Al
 
10
Si
 
35
O
 
90
] · 45H
 
2
O
9.GC.35Paulingite-K
(K
 
2
,Ca,Na
 
2
,Ba)
 
5
[Al
 
10
Si
 
35
O
 
90
] · 45H
 
2
O
Related Minerals - Hey's Index Grouping:
16.10.1Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
16.10.2Lisetite
CaNa
 
2
Al
 
4
Si
 
4
O
 
16
16.10.4Thomsonite-Ca
NaCa
 
2
[Al
 
5
Si
 
5
O
 
20
] · 6H
 
2
O
16.10.5Gonnardite
Na
 
2
Ca[Al
 
2
Si
 
3
O
 
10
]
 
2
 · 7H
 
2
O
16.10.6Mesolite
Na
 
2
Ca
 
2
[Al
 
2
Si
 
3
O
 
10
]
 
3
 · 8H
 
2
O
16.10.7Faujasite
16.10.8Garronite
Na
 
2
Ca
 
5
Al
 
12
Si
 
20
O
 
64
·27H
 
2
O
16.10.9Boggsite
Ca
 
8
Na
 
3
(Si,Al)
 
96
O
 
192
·70H
 
2
O
16.10.10Herschelite
16.10.11Phillipsite
16.10.12Fedorite
KNa
 
4
Ca
 
4
[HSi
 
4
O
 
10
]
 
4
 · 6H
 
2
O
16.10.13Willhendersonite
KCa[Al
 
3
Si
 
3
O
 
12
] · 5H
 
2
O
16.10.14Barrerite
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
16.10.15Mordenite
(Na
 
2
,Ca,K
 
2
)Al
 
2
Si
 
10
O
 
24
·7H
 
2
O
16.10.16Reyerite
(Na,K)
 
2
Ca
 
14
(Si,Al)
 
24
O
 
58
(OH)
 
8
·6H
 
2
O
16.10.17Lévyne
16.10.18Clinoptilolite
16.10.19Heulandite
16.10.21Stilbite
16.10.22Dachiardite
(Na,K,Ca
 
0
·5)
 
4
(Al
 
4
Si
 
20
)O
 
48
·18H
 
2
O
16.10.23Offretite
KCaMgAl
 
5
Si
 
13
O
 
36
·16H
 
2
O or near
16.10.24Perlialite
K
 
9
Na(Ca,Sr)[Al
 
2
Si
 
4
O
 
12
]
 
6
 · 15H
 
2
O
16.10.25Erionite
16.10.26Paulingite
16.10.27Sodium Dachiardite
(Na
 
2
,Ca,K
 
2
)
 
4-5
Al
 
8
Si
 
40
O
 
96
·26H
 
2
O
16.10.28Mazzite-Mg
K
 
2
Mg
 
2
Ca
 
1.5
Al
 
9.5
Si
 
26.5
O
 
72
·28H
 
2
O or near
16.10.29Roggianite
Ca
 
2
Be(OH)
 
2
Al
 
2
Si
 
4
O
 
13
·2.5H
 
2
O

Other Names for Gobbinsite

German names:
Gobbinsit
Spanish names:
Gobbinsita

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 Gobbinsite

Reference List:Zeitschrift für Kristallographie: 171: 281-289.

Internet Links for Gobbinsite

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    Localities for Gobbinsite

    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.
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    (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
      • Rouville Co.
        • Mont Saint-Hilaire
    		Tschernich, R. (1992): Zeolites of the World, p.52, 213, Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    Hungary
     
    • Veszprém Co.
      • Tapolcai Basin
        • Zalahaláp
    		GEODA 2005/3
    Japan
     
    • Chugoku Region
      • Shimane Prefecture
        • Oki Islands
          • Nishinoshima
    		Matsuyama & Matsubara (2000) Ganseki-Koubutsu Kagaku, 29, 129-135.
    • Kyushu Island
      • Nagasaki Prefecture
        • Iki Island
    		Kuwano & Tokumaru (1993) Chigaku Kenkyu, 42, 159-167.
    New Zealand
     
    • North Island
      • Northland
        • Kaipara
          • Aranga
    		Zeolites of the World, R. Tschernich, 1992
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    UK
     
    • Northern Ireland
      • Co. Antrim
        • Giant's Causeway
        • Larne
    		MinMag 58:615
        • Magee Island
          • Gobbins
            • Hills Port
    		Min. Mag.(1982) 46, 365-369
        • Port Muck
    		Wilson O., Dyer A., Enamy H. (2003): Zeolites of the British Isles. British Micromount Society, Occasional Paper, 15
    Mineral and/or Locality
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