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|Lustre:||Vitreous||Hardness:||5 - 6|
|Magnesium-iron-manganese Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup|
|Name:||Originally named mangan-cummingtonite in 1966 by Hugo Strunz in allusion to its composition, containing MANGANese, and its relationship to Cummingtonite.|
In order to better distinguish between amphibole end-member member compositions, the CNMNC has decided to rename manganocummingtonite. The name is not yet (Nov 2012) decided.
Classification of Manganocummingtonite
|Strunz 8th edition ID:||8/F.07-40|
|Nickel-Strunz 10th (pending) edition ID:||9.DE.05|
9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
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Type Occurrence of Manganocummingtonite
|Type Locality:||Tirodi Mine, Tirodi, Balaghat District, Madhya Pradesh, India|
Physical Properties of Manganocummingtonite
|Hardness (Mohs):||5 - 6|
Crystallography of Manganocummingtonite
Optical Data of Manganocummingtonite
|RI values:||nα = 1.630 - 1.638 nβ = 1.644 - 1.651 nγ = 1.652 - 1.665|
|Maximum Birefringence:||δ = 0.022 - 0.027|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Manganocummingtonite
|Essential elements:||H, Mg, Mn, O, Si|
|All elements listed in formula:||H, Mg, Mn, O, Si|
Relationship of Manganocummingtonite to other Species
|Member of:||Magnesium-iron-manganese Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Manganocummingtonite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Manganocummingtonite
Mineralogical Record: 29: 169-174.
American Mineralogist (1997): 82: 1024-1025.
Hawthorne, Frank C., and Roberta Oberti (2006), On the classification of amphiboles: Canadian Mineralogist: 44(1): 1-21.
Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048
Best Localities for Manganocummingtonite
|Best of Species:||Manganocummingtonite|
Internet Links for Manganocummingtonite
Localities for Manganocummingtonite
The 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. ? 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.
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Locality Updated: Line pit (Lowe's Mine), State Line District, Cecil Co., Maryland, USAFrom Bill Cordua, 9th Dec 2013 21:28:40