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|System:||Monoclinic||Colour:||Translucent nickel green|
|Name:||For Raymond W. Ludden the chief geologist for Western Exploration, Phelps Dodge Corp.|
This page provides mineralogical data about Luddenite.
Classification of Luddenite
|Strunz 8th edition ID:||8/D.21-10|
|Nickel-Strunz 10th (pending) edition ID:||9.HH.10|
9 : SILICATES (Germanates)
H : Unclassified silicates
H : With Pb
|Dana 8th edition ID:||126.96.36.199|
78 : Unclassified Silicates
|Hey's CIM Ref.:||14.13.3|
14 : Silicates not Containing Aluminum
13 : Silicates of Pb
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Type Occurrence of Luddenite
|Type Locality:||Unnamed prospect, Artillery Peak, Artillery Mts, Mohave Co., Arizona, USA|
|Year of Discovery:||1982|
Physical Properties of Luddenite
|Colour:||Translucent nickel green|
|Streak:||Pale nickel green|
|Density (measured):||4.45 g/cm3|
Crystallography of Luddenite
|Cell Parameters:||a = 7.85Å, b = 20.06Å, c = 14.72Å|
β = 90.78°
|Ratio:||a:b:c = 0.391 : 1 : 0.734|
|Unit Cell Volume:||V 2,317.76 Å³ (Calculated from Unit Cell)|
|Morphology:||Grains not exceeding 0.01 mm in size. They form in rosettes or fan-shaped aggregates closely packed together. Where individual grains can be discerned, they are scales or plates with wedge-shaped terminations.|
Optical Data of Luddenite
|RI values:||nα = 1.852 nγ = 1.867|
|Maximum Birefringence:||δ = 0.015|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Comments:||gamma=rich emerald green, alpha = beta = yellow green.|
Chemical Properties of Luddenite
|Essential elements:||Cu, H, O, Pb, Si|
|All elements listed in formula:||Cu, H, O, Pb, Si|
Relationship of Luddenite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Luddenite
|Other Information:||Luddenite is not easily soluble in acids. Dissolution even in heated 50 % HNO3 was slow. It readily fuses to a runny lemon yellow slag in the closed tube.|
|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 Luddenite
Mineralogical Magazine (1982): 46: 363-364.
American Mineralogist (1983): 68: 643.
Internet Links for Luddenite
Localities for Luddenite
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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