Lederite (of Shepard)
A variety of Titanite
This page is currently not sponsored. Click here to sponsor this page.
Alois von Lederer
Formula:
CaTi(SiO4)O
Name:
Named in 1840 by Charles Upham Shepard in honor of Alois "Lewis" Joseph Xaver Freiherr (Baron) von Lederer [May 20, 1773 Wien, Holy Roman Empire (Austria) - December 20, 1842 New York, New York, USA], mineral collector and Consul General of the Austrian Empire to the United States of America (1820-1842) {King, 2012, King and Chinellato, 2012}. The lederite debate was heated (Silliman, Jr., 1844; Shepard, 1844) and not finally understood until Williams (1885). Note: "Lederite" of Torrey (1829) was a typographical error for "Ledererite".
First Recorded Localities:
ⓘ Miller Mine (Keystone Mine; Grenville graphite deposit), Grenville-sur-la-Rouge, Argenteuil RCM, Laurentides, Québec, Canada
ⓘ Farr property, Natural Bridge station, Diana Township, Lewis County, New York, USA
ⓘ Town of Philipstown, Putnam County, New York, USA
ⓘ Rossie, St. Lawrence County, New York, USA
ⓘ Farr property, Natural Bridge station, Diana Township, Lewis County, New York, USA
ⓘ Town of Philipstown, Putnam County, New York, USA
ⓘ Rossie, St. Lawrence County, New York, USA
Lederite is a variety of titanite, generally red brown to dark brown, that also has a distinct parting, originally mistaken as a cleavage. Because this "cleavage" was not present in ordinary titanite, it was described as a separate species. This mineral is one of the earliest minerals, though not the earliest, that was recognized to have parting, instead of true cleavage (Williams, 1885).
Unique Identifiers
Mindat ID:
9981 (as Lederite (of Shepard))
3977 (as Titanite)
3977 (as Titanite)
Long-form identifier:
mindat:1:1:9981:9 (as Lederite (of Shepard))
mindat:1:1:3977:8 (as Titanite)
mindat:1:1:3977:8 (as Titanite)
Similar Names
| Bederite | A valid IMA mineral species | Ca2(Mn2+)4(Fe3+)2(PO4)6 · 2H2O |
| Laterite | A rock classification type | |
| Lederit | A synonym of Gmelinite Subgroup | |
| Lederite | ||
| Lederite (of Jackson and Hayes) | A synonym of 'Ledererite' | |
| Leedrite | A synonym of 'Leedsite' | |
| Lotrite | A synonym of Pumpellyite Subgroup |
Chemistry of Lederite (of Shepard)
Mindat Formula:
CaTi(SiO4)O
Element Weights:
Elements listed:
First Recorded Occurrence of Lederite (of Shepard)
Co-First Recorded Localities:
ⓘ Miller Mine (Keystone Mine; Grenville graphite deposit), Grenville-sur-la-Rouge, Argenteuil RCM, Laurentides, Québec, Canada
ⓘ Farr property, Natural Bridge station, Diana Township, Lewis County, New York, USA
ⓘ Town of Philipstown, Putnam County, New York, USA
ⓘ Rossie, St. Lawrence County, New York, USA
ⓘ Farr property, Natural Bridge station, Diana Township, Lewis County, New York, USA
ⓘ Town of Philipstown, Putnam County, New York, USA
ⓘ Rossie, St. Lawrence County, New York, USA
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 Lederite (of Shepard)
mindat.org URL:
https://www.mindat.org/min-9981.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Lederite (of Shepard)
Reference List:
Localities for Lederite (of Shepard)
Showing 7 localities.
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.
Canada | |
| Foote et al. (8) |
| Shepard (1840) |
USA | |
| Shepard (1844) |
| Whitlock |
| Shepard |
| Shepard |
| Shepard (1840) |
