Chongite (original) (raw)

A valid IMA mineral species

About ChongiteHide

This section is currently hidden. Click the show button to view.

Formula:

Ca3Mg2(AsO4)2(AsO3OH)2 · 4H2O

Crystal System:

Monoclinic

Name:

Honours Dr. Guillermo Chong Díaz (born 1936). Dr. Chong is a prominent Chilean geologist and academician whose research has largely focused on the Atacama Desert. During his approximately 50-year career, he has some 250 publications and meeting presentations, including serving as lead author for the chapter on Industrial Minerals and Rocks in The Geology of Chile published by the Geological Society of London in 2007. Dr. Chong is currently a professor in the Department of Geological Sciences at Universidad Católica del Norte in Antofagasta, Chile.

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:46711:3

2603620f-8a47-4197-b51d-e491d65c2126

IMA Classification of ChongiteHide

This section is currently hidden. Click the show button to view.

Classification of ChongiteHide

This section is currently hidden. Click the show button to view.

8.00.

8 : PHOSPHATES, ARSENATES, VANADATES
0 :
0 :

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

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

Physical Properties of ChongiteHide

This section is currently hidden. Click the show button to view.

Cleavage:

Distinct/Good
on {100}

Density:

3.09 g/cm3 (Measured) 3.087 g/cm3 (Calculated)

Optical Data of ChongiteHide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 1.612(1) _n_β = 1.626(1) _n_γ = 1.635(1)

2V:

Measured: 76.9° , Calculated: 76.9°

δ = 0.023

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

Dispersion:

r & lt; v, distinct

Pleochroism:

Non-pleochroic

Chemistry of ChongiteHide

This section is currently hidden. Click the show button to view.

Mindat Formula:

Ca3Mg2(AsO4)2(AsO3OH)2 · 4H2O

Crystallography of ChongiteHide

This section is currently hidden. Click the show button to view.

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 18.5879(6) Å, b = 9.3660(3) Å, c = 9.9622(7) Å
β = 96.916(7)°

Ratio:

a:b:c = 1.985 : 1 : 1.064

Morphology:

Prismatic crystals; tightly intergrown radial aggregates

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of ChongiteHide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Prismatic crystals to about 1 mm in length grouped in tightly intergrown radial aggregates to about 2 mm in diameter

Place of Conservation of Type Material:

Co-type material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 65585, 65586 and 65587

Geological Setting of Type Material:

Veins rich in secondary arsenic and copper minerals that intersect metamorphosed marine shales and lavas. Formed from the oxidation of native arsenic and other As-bearing primary phases, followed by later alteration by saline fluids derived from evaporating meteoric water under hyperarid conditions.

Associated Minerals at Type Locality:

Synonyms of ChongiteHide

This section is currently hidden. Click the show button to view.

Relationship of Chongite to other SpeciesHide

This section is currently hidden. Click the show button to view.

Other Members of this group:

Common AssociatesHide

This section is currently hidden. Click the show button to view.

Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

Notes:

Slowly soluble in dilute HCl at room temperature.

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 ChongiteHide

This section is currently hidden. Click the show button to view.

References for ChongiteHide

This section is currently hidden. Click the show button to view.

Reference List:

Kampf, Anthony R., Nash, Barbara P., Dini, Maurizio, Molina Donoso, Arturo A. (2016) Chongite, Ca3Mg2(AsO4)2(AsO3OH)2·4H2O, a new arsenate member of the hureaulite group from the Torrecillas mine, Iquique Province, Chile. Mineralogical Magazine, 80 (7) 1255-1263 doi:10.1180/minmag.2016.080.064

Localities for ChongiteHide

This section is currently hidden. Click the show button to view.

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

This section is currently hidden. Click the show button to view.

- 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.