Modderite (original) (raw)

A valid IMA mineral species - grandfathered

About ModderiteHide

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Specific Gravity:

8.28 (Calculated)

Crystal System:

Orthorhombic

Name:

Probably for the type locality

This page provides mineralogical data about Modderite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2738:6

e99e96d2-398c-4b7a-85e3-cedfa3bc7811

IMA Classification of ModderiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of ModderiteHide

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2.CC.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.

3.10.9

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
10 : Sulphides etc. of Co

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of ModderiteHide

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Hardness:

VHN100=26 - Vickers

Density:

8.28 g/cm3 (Calculated)

Optical Data of ModderiteHide

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Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 39.8%.

Chemistry of ModderiteHide

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Crystallography of ModderiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 3.458 Å, b = 5.869 Å, c = 5.292 Å

Ratio:

a:b:c = 0.589 : 1 : 0.902

Unit Cell V:

107.40 ų (Calculated from Unit Cell)

Morphology:

tiny grains, massive

Crystal StructureHide

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CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of ModderiteHide

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Place of Conservation of Type Material:

National Museum of Natural History, Washington, D.C., USA, 161217.

Geological Setting of Type Material:

Heavy mineral concentrates

Associated Minerals at Type Locality:

Reference:

Cooper, R.A. (1923) Mineral constituents of Rand concentrates. Journal of the Chemical, Metallurgical, and Mining Society of South Africa: 24: 90-95.

Synonyms of ModderiteHide

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Other Language Names for ModderiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 ModderiteHide

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References for ModderiteHide

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Reference List:

Hazen, Robert M., Hystad, Grethe, Golden, Joshua J., Hummer, Daniel R., Liu, Chao, Downs, Robert T., Morrison, Shaunna M., Ralph, Jolyon, Grew, Edward S. (2017) Cobalt mineral ecology. American Mineralogist, 102 (1) 108-116 doi:10.2138/am-2017-5798

Localities for ModderiteHide

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This 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.

Locality ListHide

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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.