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Samfowlerite

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Formula:
Ca
 
28
Mn
 
6
Zn
 
4
(Be,Zn)
 
4
Be
 
12
[(OH)
 
3
|(SiO
 
4
)
 
3
|(Si
 
2
O
 
7
)
 
2
]
 
4
System:MonoclinicColour:Colourless
Hardness:2½ - 3
Name:
Named in 1994 by Roland C. Rouse, Donald Ralph Peacor, Pete J. Dunn, Shu-Chun Su, Peter H. Chi, and Herb Yeates in honor of Dr. Samuel Fowler [October 30, 1779 Newburgh, New York, USA - February 20, 1844 Franklin, New Jersey, USA], A physician with strong interests in science and business and a US Congressman from New Jersey, 1833-1837. He enlisted the aid of all scientists he could interest in the deposits of Franklin and Sterling Hill, NJ. In 1810, he purchased Mine Hill, with a partner, in Franklin, site of the Franklin orebody. In 1818 and 1824, he acquired the Sterling Mine from the Ogden family.
This page provides mineralogical data about Samfowlerite.

Classification of Samfowlerite

IMA status:Approved 1991
Strunz 8th edition ID:8/C.24-90
Nickel-Strunz 10th (pending) edition ID:9.BF.10

9 : SILICATES (Germanates)
B : Sorosilicates
F : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in tetrahedral [4] and greater coordination
Dana 8th edition ID:58.2.7.1

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
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Type Occurrence of Samfowlerite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Year of Discovery:1991

Physical Properties of Samfowlerite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless
Hardness (Mohs):2½ - 3

Crystallography of Samfowlerite

Crystal System:Monoclinic
Cell Parameters:a = 9.06Å, b = 17.99Å, c = 14.58Å
β = 104.86°
Ratio:a:b:c = 0.504 : 1 : 0.81
Unit Cell Volume:V 2,296.91 ų (Calculated from Unit Cell)

Optical Data of Samfowlerite

Type:Biaxial (-)
RI values: nα = 1.674 nβ = 1.680 nγ = 1.681
2V:Measured: 29° , Calculated: 44°
Maximum Birefringence:δ = 0.007

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:relatively strong

Chemical Properties of Samfowlerite

Formula:
Ca
 
28
Mn
 
6
Zn
 
4
(Be,Zn)
 
4
Be
 
12
[(OH)
 
3
|(SiO
 
4
)
 
3
|(Si
 
2
O
 
7
)
 
2
]
 
4
Simplified for copy/paste:Ca28Mn6Zn4(Be,Zn)4Be12[(OH)3|(SiO4)3|(Si2O7)2]4
Essential elements:Be, Ca, H, Mn, O, Si, Zn
All elements listed in formula:Be, Ca, H, Mn, O, Si, Zn
Common Impurities:Mg,H2O

Relationship of Samfowlerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BF.05Harstigite
Ca
 
6
(Mn,Mg)Be
 
4
Si
 
6
(O,OH)
 
24
9.BF.15Davreuxite
MnAl
 
6
Si
 
4
O
 
17
(OH)
 
2
9.BF.20Queitite
Pb
 
4
Zn
 
2
(SO
 
4
)(SiO
 
4
)(Si
 
2
O
 
7
)

Other Names for Samfowlerite

Synonyms:
IMA1991-045
Other Languages:
German:Samfowlerit
Russian:Самфаулерит
Spanish:Samfowlerita

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 Samfowlerite

Reference List:

- +
Canadian Mineralogist (1994): 32: 43-53.

Internet Links for Samfowlerite

Search Engines:
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  • External Links:
  • Look for Samfowlerite on Webmineral
  • Look for Samfowlerite on Athena Mineralogy
  • Look for Samfowlerite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Samfowlerite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
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  • Samfowlerite specimens for sale - minfind.com
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  • Localities for Samfowlerite

    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.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    Rouse, R.C., et al: Can.Min.:32:43-53 (1994); Dunn(1995):Pt3:419-420.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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