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Barrerite

Big Photo

Kupreanof Island, Wrangell-Petersburg Borough, Alaska, USA
© Peter Kohorst

Show Barrerite Photos (12)
Formula:
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
System:OrthorhombicColour:White, Pink
Hardness:3 - 4
Name:Named for Richard Maling Barrer (b. 1910), New Zealand-born British teacher and student of the chemistry of zeolites


Zeolite Group .

Classification of Barrerite

IMA status:Approved
Strunz 8th edition ID:8/J.23-40
Nickel-Strunz 10th (pending) edition ID:9.GE.15

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra
Dana 7th edition ID:77.1.4.5
Dana 8th edition ID:77.1.4.5

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
Hey's CIM Ref.:16.10.14

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
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Type Occurrence of Barrerite

Type Locality:San Efisio Tower, Nora, Margherita di Pula, Cagliari Province, Sardinia, Italy
Year of Discovery:1974

Physical Properties of Barrerite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:White, Pink
Streak:White
Hardness (Mohs):3 - 4
Cleavage:Perfect
Density (measured):2.3 g/cm3
Density (calculated):2.08 g/cm3

Crystallography of Barrerite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 13.64Å, b = 18.2Å, c = 17.84Å
Ratio:a:b:c = 0.749 : 1 : 0.98
Unit Cell Volume:V 4 ų
Z:8
X-Ray Powder Diffraction:
Image Loading

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

Optical Data of Barrerite

Type:Biaxial (-)
RI values: nα = 1.479 nβ = 1.485 nγ = 1.489
2V:Measured: 78° , Calculated: 78°
Maximum Birefringence:δ = 0.010

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 Barrerite

Formula:
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
Essential elements:Al, H, Na, O, Si
All elements listed in formula:Al, Ca, H, K, Na, O, Si
Common Impurities:Fe,Mn,Mg,Sr,Ba

Relationship of Barrerite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.GE.05Clinoptilolite-Ca
(Ca,Na,K)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Clinoptilolite-K
(K,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Clinoptilolite-Na
(Na,K,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Ca
(Ca,Na)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-K
(K,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Na
(Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Sr
(Sr,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Ba
(Ba,Ca,K,Na,Sr)
 
5
Al
 
9
Si
 
27
O
 
72
·22H
 
2
O
9.GE.10Stilbite-Ca
NaCa
 
4
[Al
 
9
Si
 
27
O
 
72
] · nH
 
2
O
9.GE.10Stilbite-Na
Na
 
3
Ca
 
3
[Al
 
8
Si
 
28
O
 
72
]·nH
 
2
O
9.GE.15Stellerite
Ca[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
9.GE.20Brewsterite-Ba
(Ba,Sr)[Al
 
2
Si
 
6
O
 
16
] · 5H
 
2
O
9.GE.20Brewsterite-Sr
(Sr,Ba,Ca)[Al
 
2
Si
 
6
O
 
16
] · 5H
 
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
16.10.15Mordenite
(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
16.10.20Gobbinsite
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
·12H
 
2
O
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
Related Minerals - Dana Grouping):
77.1.4.1Heulandite-Ca
(Ca,Na)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
77.1.4.1Heulandite-K
(K,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
77.1.4.1Heulandite-Na
(Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
77.1.4.1Heulandite-Sr
(Sr,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
77.1.4.3Stilbite-Ca
NaCa
 
4
[Al
 
9
Si
 
27
O
 
72
] · nH
 
2
O
77.1.4.3Stilbite-Na
Na
 
3
Ca
 
3
[Al
 
8
Si
 
28
O
 
72
]·nH
 
2
O

Other Names for Barrerite

German names:
Barrerit
Russian names:
Баррерит
Spanish names:
Barrerita

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 Barrerite

Reference List:Bulletin de Minéralogie 98: 331-340

Galli, E., and A. Alberti (1976), The crystal structure of barrerite: Bulletin de la Société française de Minéralogie et de Cristallographie: 99: 331-340.

Alberti, A., F. Cariati, L. Erre, P. Piu, and G. Vazzalini (1983), Spectroscopic examination on the presence of OH in natural barrerite and in its collapsed phases: Physics and Chemistry of Minerals: 9: 189-191.

Internet Links for Barrerite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Barrerite in the Natural History Museum (London) online catalogue
  • Barrerite details from Handbook of Mineralogy (PDF)
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    Localities for Barrerite

    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
     
    • Northwest Territories
      • Tungsten
    		www.trinityminerals.com
    • Nova Scotia
      • Kings Co.
        • Bay of Fundy
    		Can Min 38:1215-1232
    Italy
     
    • Sardinia
      • Cagliari Province
        • Margherita di Pula
          • Nora
    		Lapis 2003(2), 21-30; Conti-Vecchi, G. & Stara, P. (1991): Minerali della Sardegna. Della Torre, Ed., Cagliari, 276 pp
        • Pula
    		E. Passaglia and D. Pongiluppi : "Barrerite, a new natural zeolite", Mineralogical Magazine, June 1975, Vol. 40, p. 208.
    Japan
     
    • Kyushu Region
      • Nagasaki Prefecture
    		Nishido et al. (2005) Koubutsu-Gakkai Kouen-Youshi, 143.
    USA
     
    • Alaska
      • Wrangell-Petersburg Borough
        • Kuiu Island
    		[www.johnbetts-fineminerals.com]
    • Nevada
      • Pershing Co.
        • Seven Throughs District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Virginia
      • Culpeper Co.
        • Mitchell
    		Minerals of Virginia, 1990 by R. V. Dietrich
    Mineral and/or Locality
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