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|Name:||Named in 1927 by Charles Palache and Lawson Henry Bauer in honor of James J. McGovern [? - 1915 USA], a prominent collector of Franklin minerals.|
The mineral species with the largest number of atoms in the unit cell.
Closely related to carlfrancisite.
Classification of Mcgovernite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||8/0.0-20|
|Nickel-Strunz 10th (pending) edition ID:||8.BE.45|
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
|Dana 8th edition ID:||18.104.22.168|
43 : COMPOUND PHOSPHATES, ETC.
4 : Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
|Hey's CIM Ref.:||17.7.10|
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
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Type Occurrence of Mcgovernite
|Type Locality:||Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA|
|Year of Discovery:||1927|
|Geological Setting of type material:||Filling veinlets traversing lean franklinite-zincite ore rich in calcite.|
|Associated Minerals at type locality:|
Physical Properties of Mcgovernite
Crystallography of Mcgovernite
|Morphology:||Aggregates of micaceous plates and radial aggregates of platy crystals.|
Optical Data of Mcgovernite
|RI values:||nω = 1.757 nε = 1.760|
|Maximum Birefringence:||δ = 0.003|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Mcgovernite
|Simplified for copy/paste:||Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21|
|Essential elements:||As, H, Mn, O, Si, Zn|
|All elements listed in formula:||As, H, Mn, O, Si, Zn|
Relationship of Mcgovernite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Mcgovernite
|Fluorescence in UV light:||None.|
Display Requirements from:
|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 Mcgovernite
American Mineralogist (1978): 63: 150-159.
American Mineralogist (1988): 73: 1182.
Internet Links for Mcgovernite
Localities for Mcgovernite
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: Eira Correia Mine, Odeleite, Castro Marim, Faro District, PortugalFrom Rui Nunes, 24th Jul 2014 14:10:47