Varulite (original) (raw)

A valid IMA mineral species - grandfathered

About VaruliteHide

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Formula:

NaCaMn2+Mn2+2(PO4)3

Lustre:

Sub-Vitreous, Resinous, Greasy

Crystal System:

Monoclinic

Name:

Named by Percy Quensel in 1937 for its discovery locality: Varuträsk, Västerbotten, Sweden.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4158:0

0177f1af-98e9-4099-8612-996ed2c53fe9

IMA Classification of VaruliteHide

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Approved, 'Grandfathered' (first described prior to 1959)

IMA status notes:

Redefined by the IMA

IMA Formula:

Na2Mn(MnFe3+)(PO4)3

Approval history:

Redefined by IMA in 2018 (Hatert 2019).

Type description reference:

Classification of VaruliteHide

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8.AC.10

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations

38.2.3.3

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
2 : (AB)5(XO4)3

19.12.50

19 : Phosphates
12 : Phosphates of Mn

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.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of VaruliteHide

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Sub-Vitreous, Resinous, Greasy

Cleavage:

Distinct/Good
{010} good; {100} poor.

Fracture:

Irregular/Uneven

Density:

3.5 g/cm3 (Measured) 3.89 g/cm3 (Calculated)

Optical Data of VaruliteHide

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RI values:

_n_α = 1.708 - 1.720 _n_γ = 1.722 - 1.732

δ = 0.014

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

Comments:

X=yellow green, Z = grass green.

Chemistry of VaruliteHide

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Mindat Formula:

NaCaMn2+Mn2+2(PO4)3

Crystallography of VaruliteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 11.91 Å, b = 12.54 Å, c = 6.46 Å
β = 114.98°

Ratio:

a:b:c = 0.95 : 1 : 0.515

Unit Cell V:

874.56 ų (Calculated from Unit Cell)

Comment:

Min Mag. 43:227 (1979); ICDD 6-487

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of VaruliteHide

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Place of Conservation of Type Material:

Muséum Nationale d’Histoire Naturelle, Paris, France (type).
Mineralogische Sammlungen, Universität Göttingen, Germany, number GZG.MIN.7.1.43.1 (type).

Geological Setting of Type Material:

Reference:

Quensel, P. (1937) Minerals of the Varuträsk Pegmatite. I. The lithium - manganese phosphates. Geologiska Föreningens i Stockholm Förhandlingar: 59: 77-96.

Synonyms of VaruliteHide

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Other Language Names for VaruliteHide

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Relationship of Varulite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of VaruliteHide

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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 VaruliteHide

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References for VaruliteHide

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Reference List:

Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.

Localities for VaruliteHide

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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.