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Dr. Samuel Fowler
2½ - 3
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

Approved 1991

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

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) URL:
Please feel free to link to this page.

Type Occurrence of Samfowlerite

Year of Discovery:

Physical Properties of Samfowlerite

Diaphaneity (Transparency):
Hardness (Mohs):
2½ - 3

Crystallography of Samfowlerite

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

Optical Data of Samfowlerite

Biaxial (-)
RI values:
nα = 1.674 nβ = 1.680 nγ = 1.681
Measured: 29° , Calculated: 44°
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
relatively strong

Chemical Properties of Samfowlerite

Essential elements:
All elements listed in formula:
Common Impurities:

Relationship of Samfowlerite to other Species


Other Names for Samfowlerite

Name in Other Languages:

Other Information

Health Risks:
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

Localities for Samfowlerite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
  • 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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