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|Name:||Named in 1978 by Paul Brian Moore for its chemical composition as the Mn-dominant member of the group and relationship to Humite, which was named after Sir Abraham Hume [February 20, 1749 London, England, UK – March 24, 1838 Wormley Bury. England. UK], English connoisseur and collector of gems, minerals, and artwork|
|Alleghanyite, Chegemite, Chondrodite, Edgrewite, Hydroxylchondrodite, Hydroxylclinohumite, Jerrygibbsite, Kumtyubeite, Leucophoenicite, Manganhumite, Norbergite, Reinhardbraunsite, Ribbeite, Sonolite|
Classification of Manganhumite
|IMA status:||Approved 1969|
|Strunz 8th edition ID:||8/B.04-80|
|Nickel-Strunz 10th (pending) edition ID:||9.AF.50|
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in ,  and/or only  coordination
|Dana 8th edition ID:||52.3.2c.3|
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in  coordination only
|Hey's CIM Ref.:||14.18.12|
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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Type Occurrence of Manganhumite
|Type Locality:||Brattfors Mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden|
|Year of Discovery:||1969|
Physical Properties of Manganhumite
Crystallography of Manganhumite
|Cell Parameters:||a = 10.54Å, b = 21.45Å, c = 4.82Å|
|Ratio:||a:b:c = 0.491 : 1 : 0.225|
|Unit Cell Volume:||V 1,089.72 Å³ (Calculated from Unit Cell)|
Optical Data of Manganhumite
|RI values:||nα = 1.707 nβ = 1.712 nγ = 1.723|
|2V:||Measured: 37° , Calculated: 70°|
|Maximum Birefringence:||δ = 0.016|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r > v weak|
Chemical Properties of Manganhumite
|Simplified for copy/paste:||(Mn2+,Mg)7(SiO4)3(OH)2|
|Essential elements:||H, Mn, O, Si|
|All elements listed in formula:||H, Mg, Mn, O, Si|
Relationship of Manganhumite to other Species
|Member of:||Humite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Manganhumite
|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 Manganhumite
American Mineralogist (1978): 63: 874-877.
American Mineralogist (1979): 64: 243.
American Mineralogist (1985): 70: 379.
Best Localities for Manganhumite
|Best of Species:||Manganhumite|
Internet Links for Manganhumite
Localities for Manganhumite
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: Angola 2 Diggings, Sibinndi, Commune (Arrondissement) Diakon, Kayes Region, MaliFrom Demetrius Pohl, 1st Sep 2014 21:07:17