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Pabstite

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Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
© Knut Eldjarn

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Formula:
Ba(Sn,Ti)(Si
 
3
O
 
9
)
System:HexagonalColour:Colourless, white
Lustre:VitreousHardness:6
Member of:Benitoite Group
Name:
After Adolf Pabst (1899-1990), American mineralogist.


Benitoite Group. The tin analogue of Benitoite.

Classification of Pabstite

IMA status:Approved 1964
Strunz 8th edition ID:8/E.01-20
Nickel-Strunz 10th (pending) edition ID:9.CA.05

9 : SILICATES (Germanates)
C : Cyclosilicates
A : [Si3O9]6- 3-membered single rings (dreier-Einfachringe), without insular complex anions
Dana 8th edition ID:59.1.1.3

59 : CYCLOSILICATES Three-Membered Rings
1 : Three-Membered Rings, anhydrous, no other anions
Hey's CIM Ref.:14.12.4

14 : Silicates not Containing Aluminum
12 : Silicates of Sn
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Type Occurrence of Pabstite

Type Locality:Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Year of Discovery:1964

Physical Properties of Pabstite

Lustre:Vitreous
Colour:Colourless, white
Hardness (Mohs):6

Crystallography of Pabstite

Crystal System:Hexagonal
Cell Parameters:a = 6.7Å, c = 9.82Å
Ratio:a:c = 1 : 1.466
Unit Cell Volume:V 381.76 ų (Calculated from Unit Cell)

Optical Data of Pabstite

Type:Uniaxial (-)
RI values: nω = 1.685 nε = 1.674
Maximum Birefringence:δ = 0.011

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Comments:RI is lower in less titanium rich material. see: Pautov, L. (2003): New Data on Minerals: 38: 15-19.

Chemical Properties of Pabstite

Formula:
Ba(Sn,Ti)(Si
 
3
O
 
9
)
Essential elements:Ba, O, Si, Sn
All elements listed in formula:Ba, O, Si, Sn, Ti

Relationship of Pabstite to other Species

Member of:Benitoite Group
Other Members of Group:

- +
Bazirite
BaZr(Si
 
3
O
 
9
)
Benitoite
BaTi(Si
 
3
O
 
9
)
Wadeite
K
 
2
Zr(Si
 
3
O
 
9
)
Related Minerals - Nickel-Strunz Grouping):

- +
9.CA.05Bazirite
BaZr(Si
 
3
O
 
9
)
9.CA.05Benitoite
BaTi(Si
 
3
O
 
9
)
9.CA.10Wadeite
K
 
2
Zr(Si
 
3
O
 
9
)
9.CA.15Calciocatapleiite
CaZr(Si
 
3
O
 
9
) · 2H
 
2
O
9.CA.15Catapleiite
Na
 
2
Zr(Si
 
3
O
 
9
) · 2H
 
2
O
9.CA.20Pseudowollastonite
CaSiO
 
3
9.CA.25Margarosanite
Pb(Ca,Mn
2+
 
)
 
2
(Si
 
3
O
 
9
)
9.CA.25Walstromite
BaCa
 
2
(Si
 
3
O
 
9
)
9.CA.30Bobtraillite
(Na,Ca)
 
13
Sr
 
11
(Zr,Y,Nb)
 
14
(Si
 
3
O
 
9
)
 
10
(H
 
2
BSi
 
2
O
 
9
)
 
6
 · 12H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.12.1Brannockite
(K,Na)□
 
2
Li
 
3
(Sn,Zr,Ti)
 
2
[Si
 
12
O
 
30
]
14.12.2Malayaite
CaSn(SiO
 
4
)O
14.12.3Stokesite
CaSn[Si
 
3
O
 
9
] · 2H
 
2
O

Other Names for Pabstite

Synonyms:
IMA1964-022
Other Languages:
German:Pabstit
Russian:Пабстит
Spanish:Pabstita

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 Pabstite

Reference List:

- +
Gross, Eugene Bischoff, John E.N. Wainwright & B.W Evans (1965), Pabstite, the tin analogue of benitoite: American Mineralogist: 50: 1164-1169.

American Mineralogist (1984): 69: 358.

Neues Jahrbuch für Mineralogie, Monatshefte (1987): 16-30.

Pautov, L. (2003): New Data on Minerals: 38: 15-19.

Internet Links for Pabstite

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

    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.
    Mexico
     
    • Baja California (Baja California Norte; BC Norte)
      • Tres Pozos
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alai (Alayskiy) Range
    		http://webcenter.ru/~minbooks/ndm_38_cont.html; Pautov, L. (2003): New Data on Minerals: 38: 15-19.
    USA
     
    • California
      • Santa Cruz Co.
        • Santa Cruz
    		Gross, Eugene Bischoff & John E.N. Wainwright (1964), Barium-tin-titanium silicate having the benitoite structure (abstract): Geological Society of America, Cordilleran Section Meeting Program, Seattle, March 1964: 36; Gross, E.B., Wainwright, J.E.N., and Evans, B.W. (1965) Pabstite, the tin analogue of benitoite. American Mineralogist: 50: 1164-1169; Gross, E.B., Chesterman, C.W., Dunning, G.E., and Cooper, J.F. (1967) Mineralogy of the Kalkar quarry, Santa Cruz, California. California Division Mines and Geol. Special Report 92: 3-10; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 467.
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