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Algerite

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Francis Willis Alger
Formula:
Ca4Al6Si6O24CO3
Colour:
Pale yellow white to light gray white
Lustre:
Sub-Vitreous, Waxy, Dull
Hardness:
3 - 3½
Specific Gravity:
2.70 - 2.78
Member of:
Name:
Named by Thomas Sterry Hunt in 1849 after Francis Alger [March 8, 1807 Bridgewater, MA, USA - November 27, 1863 Washington, DC, USA], Boston iron manufacturer, chemist, and mineral collector. Alger revised Phillips' Mineralogy in 1844. The Cyrus A. Alger Iron Works of South Boston, Massachusetts manufactured canons and various exploding ordnance. The Alger Tunnel at Franklin, New Jersey was opened by the Alger Iron Works and reputedly added franklinite directly to their iron as a natural alloy ore.
A variety of Meionite

Square unterminated prisms to several cm, rarely shows the normal pyramid. Varies from fresh to an altered meionite partly replaced by muscovite and possibly minor vesuvianite.


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Physical Properties of AlgeriteHide

Sub-Vitreous, Waxy, Dull
Transparency:
Translucent
Comment:
Luster decreases on alteration
Colour:
Pale yellow white to light gray white
Comment:
Frequently nearly white; dark brownish yellow when altered
Streak:
White
Hardness:
3 - 3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
{110}
Fracture:
Irregular/Uneven, Splintery
Density:
2.70 - 2.78 g/cm3 (Measured)    

Chemical Properties of AlgeriteHide

Formula:
Ca4Al6Si6O24CO3

First Recorded Occurrence of AlgeriteHide

General Appearance of First Recorded Material:
Pale yellow to gray white
Geological Setting of First Recorded Material:
Franklin Marble
Associated Minerals at First Recorded Locality:

Other Language Names for AlgeriteHide

German:Algerit
Spanish:Algerita

Relationship of Algerite to other SpeciesHide

Member of:
Other Members of this group:
MarialiteNa4Al3Si9O24ClTet. 4/m : I4/m
MeioniteCa4Al6Si6O24CO3Tet. 4/m : I4/m
ScapoliteThis term generally refers to just the marialite-meionite series, not the full scapolite group, ...Tet.
Silvialite(Ca,Na)4(Al6Si6O24)(SO4,CO3)Tet. 4/m : I4/m

Other InformationHide

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 AlgeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hunt, Thomas Sterry (1849) Chemical examination of algerite, a new mineral species, including a description of the mineral by F. Alger. American Journal of Science, series 2: 8: 103-106.
Crossley, Richard (1850) Analysis of algerite. American Journal of Science, series 2: 10: 77-78.
Dana, James Dwight, Brush, George Jarvis (1868) A System of Mineralogy, fifth edition, John Wiley and Son, New York, p. 323.
King, Vandall T. (2006) In search of Francis Alger, a Boston mineralogist. Journal of the Geoliterary Society: 21(1): 4-14.

Internet Links for AlgeriteHide

Localities for AlgeriteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (FRL)
 
  • New Jersey
    • Sussex Co.
      • Franklin mining district
        • Franklin
Hunt (1852)
Mineral and/or Locality  
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