Chinnerite (original) (raw)

A valid IMA mineral species

Formula:

[Mg(H2O)6]Na(H2O)2Al3(PO4)2F6

the simplified formula is NaMgAl3(PO4)2F6(H2O)8

Specific Gravity:

2.27 (Calculated)

Crystal System:

Monoclinic

Chemically and structurally related to penriceite of which it is the anhydrate counterpart. Also compare the chemically similar aldermanite and elliottite.

Product of dehydration of penriceite at T ≥ 40 oC.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:471005:5

b8db8883-d314-4be6-ac7b-0c612f4eb2ca

IMA Classification of ChinneriteHide

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Type description reference:

Elliott, Peter, Grey, Ian E., Boer, Stephanie, Kampf, Anthony R., MacRae, Colin M., Glenn, Alexander. M, Davidson, Cameron (2024) Chinnerite, [Mg(H2O)6]Na(H2O)2Al3(PO4)2F6, a new penriceite-related mineral, from the Penrice Marble Quarry, South Australia. Australian Journal of Mineralogy, 25 (1). 5-13

Classification of ChinneriteHide

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8.DM.

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1

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 ChinneriteHide

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Density:

2.27 g/cm3 (Calculated)

Optical Data of ChinneriteHide

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RI values:

_n_α = 1.496(2) _n_β = 1.497(2) _n_γ = 1.498(2)

2V:

Measured: 70° (1), Calculated: 89.9°

δ = 0.002

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

Pleochroism:

Non-pleochroic

Chemistry of ChinneriteHide

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Mindat Formula:

[Mg(H2O)6]Na(H2O)2Al3(PO4)2F6

the simplified formula is NaMgAl3(PO4)2F6(H2O)8

Crystallography of ChinneriteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 9.863(3) Å, b = 6.946(1) Å, c = 12.345(2) Å
β = 96.85(3)°

Ratio:

a:b:c = 1.42 : 1 : 1.777

Unit Cell V:

839.70 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Type Occurrence of ChinneriteHide

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General Appearance of Type Material:

aggregates of platy crystals, growing from the surface of sub-millimetre rods of angastonite

Place of Conservation of Type Material:

in the collections of the South Australian Museum, North Terrace, Adelaide, SA 5000, Australia, catalogue number G35383 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 76301 (cotype)

Geological Setting of Type Material:

marble quarry. considered to have formed by dehydration of penriceite at temperatures of ≥40°C.

Associated Minerals at Type Locality:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 ChinneriteHide

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References for ChinneriteHide

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Reference List:

Elliott, P., Grey, I.E., Boer, S., Kampf, A.R., MacRae, C.M., Glenn, A. and Davidson, C. (2024) Chinnerite, IMA 2023-083. CNMNC Newsletter 77; Mineralogical Magazine, 88, https://doi.org/10.1180/mgm.2024.5

Elliott, Peter, Grey, Ian E., Boer, Stephanie, Kampf, Anthony R., MacRae, Colin M., Glenn, Alexander. M, Davidson, Cameron (2024) Chinnerite, [Mg(H2O)6]Na(H2O)2Al3(PO4)2F6, a new penriceite-related mineral, from the Penrice Marble Quarry, South Australia. Australian Journal of Mineralogy, 25 (1). 5-13

Localities for ChinneriteHide

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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.