Jamborite (original) (raw)

A valid IMA mineral species

About JamboriteHide

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Formula:

Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O

Name:

Named in 1973 by Noris Morandi and Giorgio Dalrio in honor of John Leslie Jambor [1936–January 18, 2008 Vancouver, British Columbia, Canada], Canadian mineralogist, Geological Survey of Canada, Ottawa and CANMET, Ottawa, (1960-1993), Professor of Mineralogy (1994-2000), University of Waterloo, Waterloo, Ontario, and co-editor of the Canadian Mineralogist (1975-1977). Jambor is one of the most prolific investigators of Canadian type minerals, who described or participated in the description of 31 new species.

Co-Type Localities:

ⓘ Ca' dei Ladri (Silla), Gaggio Montano, Metropolitan City of Bologna, Emilia-Romagna, Italy
ⓘ Monteacuto Ragazza, Grizzana Morandi, Metropolitan City of Bologna, Emilia-Romagna, Italy
ⓘ Sasso delle Lucine, Castelluccio di Moscheda, Montese, Modena Province, Emilia-Romagna, Italy
ⓘ Rio Vesale, Vesale, Sestola, Modena Province, Emilia-Romagna, Italy

As part of the recent re-evaluation of the nomenclature of the hydrotalcite supergroup (Mills et al., 2012), jamborite was identified as a questionable species which needs further investigation. Subsequently, it was redefined in 2014 as a valid species (IMA 14-E). Jamborite lies outside the hydrotalcite supergroup as defined by Mills et al. (2012).

NOTE:
Jamborite is a redefined mineral species, and what has been referred to as jamborite in the literature pre-2015 may no longer fit into the redefinition. Andrew G. Christy comments on this at the message board [See: http://www.mindat.org/forum.php?read,6,55404,393341#msg-393341] : "1. Jamborite is a valid mineral species, but rather different from the original description. It is a basic sulfate with a layered structure that is not quite a member of the hydrotalcite supergroup, but bears close resemblances to those minerals and also to mooreite, etc. There is no sulfide in it, but in addition to Ni2+, there is a small amount of a trivalent cation which appears to be Co3+; the need for relatively high Co and low Fe probably explains the rarity of the species. 2. Most green coatings on millerite are probably hydrohonessite; honessite appears to be rarer, and hydrates readily to hydrohonessite".

According to the recent compositional and structural redefinition of jamborite (Bindi et al., 2015), the neotype specimen comes from Rio Vesale, Italy.
https://www.mindat.org/loc-267598.html

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2070:7

29ca0a55-cfeb-4e4f-9a93-ec6daf85d45a

IMA Classification of JamboriteHide

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IMA status notes:

Redefined by the IMA

IMA Formula:

Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O [x ≤ 1/3 n; ≤ (1-x)]

Approval history:

Redefined BY IMA 2014 as a valid species (IMA 14-E).

Type description reference:

Bindi, Luca, Christy, Andrew G., Mills, Stuart J., Ciriotti, Marco E., Bittarello, Erica (2015) New compositional and structural data validate the status of jamborite. The Canadian Mineralogist, 53 (5). 791-802 doi:10.3749/canmin.1400050

Classification of JamboriteHide

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4.FL.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra

6.3.8.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
3 : X(OH)3

7.22.4

7 : Oxides and Hydroxides
22 : Oxides of Ni

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 JamboriteHide

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Density:

2.67 g/cm3 (Measured) 2.69 g/cm3 (Calculated)

Optical Data of JamboriteHide

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RI values:

_n_ω = 1.607 _n_ε = 1.602

δ = 0.005

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of JamboriteHide

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Mindat Formula:

Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O

where [x≤1/3; n≤(1-x)]

Crystallography of JamboriteHide

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Class (H-M):

3_m_ _(_32/m ) - Hexagonal Scalenohedral

Cell Parameters:

a = 3.068 Å, c = 23.298 Å

Unit Cell V:

189.92 ų (Calculated from Unit Cell)

Comment:

Data from Bindi et al. (2015)

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Italy. Data from the type description.

Geological EnvironmentHide

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Type Occurrence of JamboriteHide

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Co-Type Localities:

ⓘ Ca' dei Ladri (Silla), Gaggio Montano, Metropolitan City of Bologna, Emilia-Romagna, Italy
ⓘ Monteacuto Ragazza, Grizzana Morandi, Metropolitan City of Bologna, Emilia-Romagna, Italy
ⓘ Sasso delle Lucine, Castelluccio di Moscheda, Montese, Modena Province, Emilia-Romagna, Italy
ⓘ Rio Vesale, Vesale, Sestola, Modena Province, Emilia-Romagna, Italy

General Appearance of Type Material:

Green coatings and pseudomorphs after millerite. Aggregates of parallel fibers and lamellae.

Place of Conservation of Type Material:

Museo dell’Istituto di Mineralogia e Petrografia dell’
Università, Bologna, Italy.

Geological Setting of Type Material:

In small cavities in ophiolitic rocks, forming pseudomorphs after millerite.

Associated Minerals at Type Locality:

Reference:

Morandi N, Dalrio G (1973) Jamborite: A new nickel hydroxide mineral from the Northern Apennines, Italy. American Mineralogist 58, 835-839; Reference: Bindi, L., Christy, A.G., Mills, S.J., Ciriotti, M.E., and Bittarello, E. (2015) New compositional and structural data validate the status of jamborite. Canadian Mineralogist, 53, 791-802.

Synonyms of JamboriteHide

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Other Language Names for JamboriteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Notes:

Insoluble in water but slowly soluble in cold dilute HCl without any visible reaction.

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 JamboriteHide

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References for JamboriteHide

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Reference List:

Mills, S. J., Christy, A. G., Génin, J.-M. R., Kameda, T., Colombo, F. (2012) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76 (5) 1289-1336 doi:10.1180/minmag.2012.076.5.10

Bindi, Luca, Christy, Andrew G., Mills, Stuart J., Ciriotti, Marco E., Bittarello, Erica (2015) New compositional and structural data validate the status of jamborite. The Canadian Mineralogist, 53 (5). 791-802 doi:10.3749/canmin.1400050

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 JamboriteHide

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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.