Peterandresenite (original) (raw)

A valid IMA mineral species

About PeterandreseniteHide

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

Formula:

Mn4Nb6O19 · 14H2O

Lustre:

Vitreous, Resinous

Crystal System:

Monoclinic

Name:

Named after the Norwegian mineral collector Peter Andresen, who first found the mineral.

The first naturally occurring hexaniobate. It has a novel structure consisting of six edge-sharing NbO6 octahedra forming a super octahedron known as a Lindqvist ion. Three such complex ions are interconnected by one Mn2+-centred octahedron to form a two-dimensional layer perpendicular to c. The second Mn2+-centred octahedron bridges the Lindqvist ion, protrudes into the adjacent layer along c, and takes part in the formation of 3D structure via hydrogen bonds.

Somewhat chemically and visually similar are the heteropolyniobates menezesite and aspedamite. Also chemically similar to hansesmarkite.

Unique IdentifiersHide

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

Long-form identifier:

mindat:1:1:43796:3

36a7dc09-fda2-42b1-8ef2-a4f00e4de4e4

IMA Classification of PeterandreseniteHide

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

Classification of PeterandreseniteHide

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

7.GB.60

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O

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 PeterandreseniteHide

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

Transparency:

Transparent, Translucent

Fracture:

Irregular/Uneven

Density:

3.10(1) g/cm3 (Measured) 3.05 g/cm3 (Calculated)

Optical Data of PeterandreseniteHide

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

RI values:

_n_α = 1.760(5) _n_β = 1.795(5) _n_γ = 1.800(5)

2V:

Measured: 43° (2), Calculated: 40°

δ = 0.040

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

Comments:

X (colourless) < Z (pale orange)<

Chemistry of PeterandreseniteHide

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

Mindat Formula:

Mn4Nb6O19 · 14H2O

Crystallography of PeterandreseniteHide

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

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 15.329(1) Å, b = 9.4121(5) Å, c = 11.2832(9) Å
β = 118.650(4)°

Ratio:

a:b:c = 1.629 : 1 : 1.199

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 PeterandreseniteHide

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

General Appearance of Type Material:

It occurs as equidimensional, transparent to translucent orange crystals up to 1 mm with a pale orange streak and a vitreous to resinous lustre.

Place of Conservation of Type Material:

In the collections of the Natural History Museum, University of Oslo, Oslo, Norway, catalogue numbers 43490 and 43492, and the Mineral Sciences Department, Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue number 64008.

Geological Setting of Type Material:

The mineral was found on fracture surfaces and in tiny vugs in the centre of a miaskitic pegmatite dike.

Synonyms of PeterandreseniteHide

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

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.

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 PeterandreseniteHide

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

References for PeterandreseniteHide

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

Reference List:

Friis, Henrik, Larsen, Alf Olav, Kampf, Anthony R., Evans, R. James, Selbekk, Rune S., Sánchez, A. Aranda, Kihle, Jan (2014) Peterandresenite, Mn4Nb6O19·14H2O, a new mineral containing the Lindqvist ion from a syenite pegmatite of the Larvik Plutonic Complex, southern Norway. European Journal of Mineralogy, 26 (4) 567-576 doi:10.1127/0935-1221/2014/0026-2385

Localities for PeterandreseniteHide

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.