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Sanbornite

Big Photo

Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
© Paul Bongaerts

Show Sanbornite Photos (3)
Formula:
Ba
 
2
[Si
 
4
O
 
10
]
System:OrthorhombicColour:Colourless to white
Hardness:5
Name:Named after Frank Sanborn, mineralogist, California Division of Mines, San Francisco, California, USA.
This page provides mineralogical data about Sanbornite.

Classification of Sanbornite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/H.02-50
Nickel-Strunz 10th (pending) edition ID:9.EF.10

9 : SILICATES (Germanates)
E : Phyllosilicates
F : Single nets with 6-membered rings, connected by M[4], M[8], etc.
Dana 8th edition ID:74.3.4.1

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
Hey's CIM Ref.:14.7.1

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
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Type Occurrence of Sanbornite

Type Locality:Trumbull Peak, Incline, Mariposa Co., California, USA
Year of Discovery:1932

Physical Properties of Sanbornite

Lustre:Pearly
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless to white
Hardness (Mohs):5

Crystallography of Sanbornite

Crystal System:Orthorhombic
Cell Parameters:a = 4.62Å, b = 7.68Å, c = 13.52Å
Ratio:a:b:c = 0.602 : 1 : 1.76
Unit Cell Volume:V 479.71 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: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Sanbornite

Type:Biaxial (-)
RI values: nα = 1.597 nβ = 1.616 nγ = 1.624
2V:Measured: 66° , Calculated: 64°
Maximum Birefringence:δ = 0.027

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 Sanbornite

Formula:
Ba
 
2
[Si
 
4
O
 
10
]
Essential elements:Ba, O, Si
All elements listed in formula:Ba, O, Si
Common Impurities:Al,Fe,Mg,Ca,Sr,H2O

Relationship of Sanbornite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EF.05Petalite
LiAlSi
 
4
O
 
10
9.EF.15Searlesite
NaBSi
 
2
O
 
5
(OH)
 
2
9.EF.20Silinaite
NaLiSi
 
2
O
 
5
·2H
 
2
O
9.EF.25Kanemite
NaHSi
 
2
O
 
4
(OH)
 
2
·2H
 
2
O
9.EF.30Yakovenchukite-(Y)
K
 
3
NaCaY
 
2
[Si
 
12
O
 
30
] · 4H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.7.2Krauskopfite
BaSi
 
2
O
 
5
·3H
 
2
O
14.7.3Walstromite
BaCa
 
2
[Si
 
3
O
 
9
]
14.7.4Macdonaldite
BaCa
 
4
Si
 
16
O
 
36
(OH)
 
2
·10H
 
2
O
14.7.5Ericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.6Orthoericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.7Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
14.7.8Andrémeyerite
BaFe
2+
2
[Si
 
2
O
 
7
]
14.7.9Pellyite
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
14.7.10Taikanite
Sr
 
3
BaMn
2+
2
[O|Si
 
2
O
 
6
]
 
2
14.7.11Willemite
Zn
 
2
[SiO
 
4
]
14.7.12Hemimorphite
Zn
 
4
[(OH)
 
2
|Si
 
2
O
 
7
] · H
 
2
O
14.7.13Zincsilite
Zn
 
3
Si
 
4
O
 
10
(OH)
 
2
·4H
 
2
O
14.7.14Hardystonite
Ca
 
2
Zn[Si
 
2
O
 
7
]
14.7.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
14.7.16Clinohedrite
CaZn[SiO
 
4
] · H
 
2
O
14.7.17Junitoite
CaZn
 
2
[Si
 
2
O
 
7
] · H
 
2
O
14.7.18Larsenite
PbZn[SiO
 
4
]
14.7.19Esperite
PbCa
 
3
Zn
 
4
[SiO
 
4
]
 
4
14.7.20Hodgkinsonite
Mn
2+
 
Zn
 
2
[(OH)
 
2
|SiO
 
4
]
14.7.21Gerstmannite
(Mg,Mn
2+
 
)Zn[(OH)
 
2
|SiO
 
4
]
14.7.22Gageite
Mn
 
21
O
 
3
(Si
 
4
O
 
12
)
 
2
(OH)
 
20
14.7.23Franklinfurnaceite
Ca
 
2
FeMn
 
3
MnZn
 
2
Si
 
2
O
 
10
(OH)
 
8

Other Names for Sanbornite

Other Languages:
German:Sanbornit
Russian:Санборнит
Spanish:Sanbornita

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 Sanbornite

Reference List:Rogers, A.F. (1932) Sanbornite, a new barium silicate mineral from Mariposa County, California. American Mineralogist: 17: 161-172.

Bradley, W.W. (1932), Sanbornite, a newly described mineral from California, CA Min. Bur. Rept. 28: 82-83.

Douglass, R.M. (1954), Crystal structure of sanbornite (abstract): Geological Society of America Bull.: 65: 1246.

Douglass, R.M. (1958), The crystal structure of sanbornite, BaSi2O5: American Mineralogist: 43: 517-536.

Hesse, K.-F. (1980) Crystal chemistry of silica-rich barium silicates. III: refinement of the crystal structures of the layer silicates Ba2[Si4O10] (I), (sanbornite), and Ba2[Si4O10] (h). Zeitschrift für Kristallographie (1980): 153: 33-41.

Internet Links for Sanbornite

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  • Raman and XRD data at RRUFF project
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  • Sanbornite details from Handbook of Mineralogy (PDF)
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    Localities for Sanbornite

    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.
    (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
     
    • Nunavut Territory
      • Baffin Island
        • Kimmirut (Lake Harbour)
    		http://www.gia.edu/gemsandgemology/18578/22211/2278/back_issue_article_detail.cfm
    • Yukon Territory
      • Watson Lake Mining District
        • Itsy Mts
          • MacMillian Pass
    		CanMin:11:444
    Mexico
     
    • Baja California Norte
      • Mun. de Ensenada
    No reference listed
      • Tres Pozos
    		Can.Min.22:653-658; American Mineralogist, Volume 69, pages 358-373, 1984
    Republic of Macedonia
     
    • Veles
    		V. Bermanec et al. : "Zn-rich magnetoplumbite from Nezilovo, Macedonia", Eur. Journ. Mineral., 1993, 5, pp 957-960
    USA
     
    • California
      • Fresno Co.
        • Big Creek-Rush Creek District
          • Rush Creek deposit
            • Big Creek
    		[MinRec 33:161]; American Mineralogist (1981), Volume 66, pages 1050-1053
    Bob Walstrom, p.c.
            • Rush Creek
    		Mineralogical Record (2002): 33: 163.
      • Mariposa Co.
        • Incline
    		[MinRec 30:414]; American Mineralogist (1981), Volume 66, pages 1050-1053; Can.Min.22:653-658
      • Tulare Co.
        • Chickencoop Canyon
    		American Mineralogist, Volume 69, pages 358-373, 1984
    Mineral and/or Locality
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