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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:For Dr. Samuel Fowler (1779-1844), 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
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

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  • Samfowlerite details from Handbook of Mineralogy (PDF)
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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.
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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.
    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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