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|Name:||Named in 1978 in honor of Marjorie Duggan [February 18, 1927 New York, New York, USA - April 9, 2002 Tucson, Arizona, USA], analytical chemist for the Phelps Dodge mining company. Duggan discovered the first existence of Te6+ in Nature.|
Classification of Dugganite
|IMA status:||Approved 1978|
|Strunz 8th edition ID:||4/K.16-10|
|Nickel-Strunz 10th (pending) edition ID:||8.DL.20|
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
|Dana 8th edition ID:||220.127.116.11|
43 : COMPOUND PHOSPHATES, ETC.
2 : Anhydrous Normal Compound Phosphates, etc·
|Hey's CIM Ref.:||28.4.10|
28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
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Type Occurrence of Dugganite
|Type Locality:||Emerald Mine, Silver Plume Mine (Emerald & Silver Plume Mine group), Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA|
|Year of Discovery:||1978|
Physical Properties of Dugganite
Crystallography of Dugganite
|Class (H-M):||3 2 - Trapezohedral|
|Space Group:||P3 2 1|
|Cell Parameters:||a = 8.460(2) Å, c = 5.206(2) Å|
|Ratio:||a:c = 1 : 0.615|
|Unit Cell Volume:||V 322.6 Å³|
Optical Data of Dugganite
|RI values:||nω = 1.977 nε = 1.967|
|Maximum Birefringence:||δ = 0.010|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Surface Relief:||Very High|
Chemical Properties of Dugganite
|Essential elements:||As, O, Pb, Te, Zn|
|All elements listed in formula:||As, O, Pb, Te, Zn|
Relationship of Dugganite to other Species
|Member of:||Dugganite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Dugganite
|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 Dugganite
Williams, S.A. (1978): Khinite, parakhinite, and dugganite, three new tellurates from Tombstone, AZ. American Mineralogist: 63: 1016-1019.
Lam, A.E., L.A. Groat, and T.S. Ercit (1998): The crystal structure of dugganite, Pb3Zn3Te6+As2O14. Canadian Mineralogist: 36: 823-830.
Internet Links for Dugganite
Localities for Dugganite
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: Cold Valley, Bad Harzburg, Harz, Lower Saxony, GermanyFrom Frank K. Mazdab, 10th Dec 2013 08:40:40