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Broken Hill, Yancowinna Co., New South Wales, Australia
© Rob Lavinsky
|Name:||Originally named manganpyrosmalite by By Clifford Frondel and Lawson H. Bauer for its manganese-dominant composition relative to the original pyrosmalite. Both pyrosmalites were later given suffixes, -(Mn) or -(Fe) by the IMA to indicated cation dominance in the chemical formula|
Classification of Pyrosmalite-(Mn)
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||8/H.28-20|
|Nickel-Strunz 10th (pending) edition ID:||9.EE.10|
9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
|Dana 8th edition ID:||72.4.1a.2|
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
4 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-, 6-, and 12-membered rings
|Hey's CIM Ref.:||17.3.14|
17 : Silicates Containing other Anions
3 : Silicates with chloride (including aluminosilicates)
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Type Occurrence of Pyrosmalite-(Mn)
|Type Locality:||Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA|
|Year of Discovery:||1953|
Physical Properties of Pyrosmalite-(Mn)
Crystallography of Pyrosmalite-(Mn)
|Cell Parameters:||a = 13.42Å, c = 7.16Å|
|Ratio:||a:c = 1 : 0.534|
|Unit Cell Volume:||V 1,116.73 Å³ (Calculated from Unit Cell)|
Optical Data of Pyrosmalite-(Mn)
|RI values:||nω = 1.680 nε = 1.640|
|Maximum Birefringence:||δ = 0.040|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Pyrosmalite-(Mn)
|Simplified for copy/paste:||(Mn,Fe)8Si6O15(OH,Cl)10|
|Essential elements:||H, Mn, O, Si|
|All elements listed in formula:||Cl, Fe, H, Mn, O, Si|
Relationship of Pyrosmalite-(Mn) to other Species
|Series:||Forms a series with Pyrosmalite-(Fe) (see here)|
|Member of:||Pyrosmalite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Pyrosmalite-(Mn)
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 Pyrosmalite-(Mn)
American Mineralogist (1953): 38: 755.
American Mineralogist (1956): 41: 581.
Canadian Mineralogist (1983): 21: 1-6.
Canadian Mineralogist (1993): 31: 695.
Internet Links for Pyrosmalite-(Mn)
Localities for Pyrosmalite-(Mn)
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: Frankfort (iron) meteorite, Franklin Co., Kentucky, USAFrom Lon Clay Hill, 22nd Oct 2014 21:47:17