Leonhardite
A variety of Laumontite
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About Leonhardite
Karl von Leonhard
Formula:
CaAl2Si4O12 · 3H2O
Name:
Named by Johann Reinhard Blum in 1843 in honor of Karl Caesar von Leonhard [September 12, 1779, Rumpenheim bei Hanau, Germany - January 23, 1862, Heidelberg, Germany]. Von Leonard was variously a tax assessor and administrator of the Grand Duchy of Frankfurt. Eventually, he became Professor of mineralogy at the University of Heidelberg. One of von Leonhard's discourses involved the first concept of loess, its occurrence, and properties.
A name for partially dehydrated, opaque laumontite.
Unique Identifiers
Mindat ID:
26821 (as Leonhardite)
2340 (as Laumontite)
2340 (as Laumontite)
Long-form identifier:
mindat:1:1:26821:1 (as Leonhardite)
mindat:1:1:2340:1 (as Laumontite)
mindat:1:1:2340:1 (as Laumontite)
IMA Classification of Leonhardite
Discredited
Chemistry of Leonhardite
Mindat Formula:
CaAl2Si4O12 · 3H2O
Element Weights:
Common Associates
Associated Minerals Based on Photo Data:
| 8 photos of Leonhardite associated with Calcite | CaCO3 |
| 3 photos of Leonhardite associated with Laumontite | CaAl2Si4O12 · 4H2O |
| 1 photo of Leonhardite associated with Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| 1 photo of Leonhardite associated with Bakerite | Ca4(H5B5Si3O20) |
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 Leonhardite
mindat.org URL:
https://www.mindat.org/min-26821.html
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References for Leonhardite
Localities for Leonhardite
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.
Australia | |
| Pinkstone (1962) |
China | |
| Shen (n.d.) |
India | |
| Ottens et al. (2022) |
Jordan | |
| Khoury et al. (1985) |
New Zealand | |
| Osborne Hutton (1944) |
USA | |
| Gilpin R. Robinson (1992) |
Grace Mine, Morgantown, Berks County, Pennsylvania, USA