Algerite
A variety of Meionite
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About Algerite
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
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.
First Recorded Locality:
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.
Unique Identifiers
Mindat ID:
113 (as Algerite)
2627 (as Meionite)
2627 (as Meionite)
Long-form identifier:
mindat:1:1:113:9 (as Algerite)
mindat:1:1:2627:3 (as Meionite)
mindat:1:1:2627:3 (as Meionite)
Similar Names
| Aegerite | A synonym of Aegirine | |
| Algarite | A synonym of Alginite | |
| Alterite | A valid IMA mineral species | Zn2Fe43+(SO4)4(C2O4)2(OH)4 · 17H2O |
| Alterite (of Andel) | ||
| Alterite (of Lelong) | A synonym of Saprolite |
Physical Properties of Algerite
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}
{110}
Fracture:
Irregular/Uneven, Splintery
Density:
2.70 - 2.78 g/cm3 (Measured)
Chemistry of Algerite
Mindat Formula:
Ca4Al6Si6O24CO3
Element Weights:
First Recorded Occurrence of Algerite
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 Algerite
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.
Internet Links for Algerite
mindat.org URL:
https://www.mindat.org/min-113.html
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References for Algerite
Reference List:
Localities for Algerite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
USA (FRL) | |
| Hunt (1852) |
Franklin Mine, Franklin, Sussex County, New Jersey, USA