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Samfowlerite

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Dr. Samuel Fowler
Formula:
Ca28Mn6Zn4(Be,Zn)4Be12[(OH)3|(SiO4)3|(Si2O7)2]4
System:
Monoclinic
Colour:
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

Approved 1991
9.BF.10

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

Year of Discovery:
1991

Physical Properties of Samfowlerite

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°
Max Birefringence:
δ = 0.007
Image 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:
Ca28Mn6Zn4(Be,Zn)4Be12[(OH)3|(SiO4)3|(Si2O7)2]4
Essential elements:
All elements listed in formula:
Common Impurities:
Mg,H2O

Relationship of Samfowlerite to other Species

9.BF.05HarstigiteCa6(Mn,Mg)Be4Si6(O,OH)24
9.BF.15DavreuxiteMnAl6Si4O17(OH)2
9.BF.20QueititePb4Zn2(SO4)(SiO4)(Si2O7)

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.
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.
Mineral and/or Locality  
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