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This page provides mineralogical data about Mcnearite.
Classification of Mcnearite
|Strunz 8th edition ID:||7/C.24-20|
|Nickel-Strunz 10th (pending) edition ID:||8.CJ.55|
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
|Dana 8th edition ID:||22.214.171.124|
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
|Hey's CIM Ref.:||20.2.15|
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
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Type Occurrence of Mcnearite
|Type Locality:||Gabe Gottes Mine (incl. Giftgrube), Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France|
|Year of Discovery:||1981|
Crystallography of Mcnearite
|Cell Parameters:||a = 13.5Å, b = 14.1Å, c = 6.95Å|
α = 90°, β = 92°, γ = 119°
|Ratio:||a:b:c = 0.957 : 1 : 0.493|
|Unit Cell Volume:||V 1,156.14 Å³ (Calculated from Unit Cell)|
Optical Data of Mcnearite
|RI values:||nα = 1.559 nβ = 1.562 nγ = 1.572|
|2V:||Measured: 60° , Calculated: 58°|
|Maximum Birefringence:||δ = 0.013|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r < v moderate|
Chemical Properties of Mcnearite
|Essential elements:||As, Ca, H, Na, O|
|All elements listed in formula:||As, Ca, H, Na, O|
Relationship of Mcnearite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Mcnearite
|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 Mcnearite
American Mineralogist (1982): 67: 856.
Internet Links for Mcnearite
Localities for Mcnearite
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.