Lasnierite (original) (raw)

A valid IMA mineral species

About LasnieriteHide

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Formula:

(Ca,Sr)(Mg,Fe2+)2Al(P[O,F]4)3

Colour:

Slightly pale pinkish brown; colorless

Specific Gravity:

3.162 (Calculated)

Crystal System:

Orthorhombic

Name:

Named in honor of Professor Bernard Lasnier (1938-), President of Centre de Recherches Gemmologiques, Nantes, France where he taught geology, mineralogy and gemmology. He conducted the first studies on lazulite-bearing quartzite from Itremo and investigated the many mineral species found as inclusions in this quartzite. The species was discovered while examining specimens as part of a diploma program that he founded. The pronunciation of lasnierite is lan-yer-ite.

Found in and described from an oval-cut, faceted gemstone (10 x 8 x 6 mm, 1.97 carats in weight). Labelled as "blue quartzite from Mount Ibity, Madagascar".

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:52878:8

f91b3947-f9f4-4645-a500-a41784c009e6

IMA Classification of LasnieriteHide

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IMA Formula:

(Ca,Sr)(Mg,Fe2+)2Al(PO4)3

Type description reference:

Rondeau, B., Devouard, B., Jacob, D., Roussel, P., Stephant, N., Boulet, C., Mollé, V., Corre, M., Fritsch, E. & Ferraris, C. (2019) Lasnierite, (Ca,Sr)(Mg,Fe)2Al(PO4)3, a new phosphate accompanying lazulite from Mt. Ibity, Madagascar: an example of structural characterization from dynamical refinement of precession electron diffraction data on submicrometre sample. European Journal of Mineralogy, 31(2), 379-388.

Classification of LasnieriteHide

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8.AC.52

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

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 LasnieriteHide

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Colour:

Slightly pale pinkish brown; colorless

Comment:

At first sight nearly colourless, but are slightly pale pinkish brown.

Density:

3.162 g/cm3 (Calculated)

Optical Data of LasnieriteHide

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Anisotropism:

anisotropic between crossed polarizers

Pleochroism:

Non-pleochroic

Chemistry of LasnieriteHide

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Mindat Formula:

(Ca,Sr)(Mg,Fe2+)2Al(P[O,F]4)3

Crystallography of LasnieriteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 6.2771(3) Å, b = 17.684(3) Å, c = 8.1631(4) Å

Ratio:

a:b:c = 0.355 : 1 : 0.462

Unit Cell V:

906.14 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Sahatsiho Ambohimanjaka, Madagascar. Data from the type description.

Geological EnvironmentHide

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Type Occurrence of LasnieriteHide

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General Appearance of Type Material:

Bladed crystals up to 120 × 60 μm in section.

Place of Conservation of Type Material:

Type material is deposited in the mineralogical collections of the Muséum National d’Histoire Naturelle (MNHN), 61 rue Buffon, 75005 Paris, France, registration number MNHN 217.001

Empirical Formula of Type Material:

(Ca0.59Sr0.37)Σ0.96(Mg1.42Fe0.54)Σ1.96Al0.87(P2.99Si0.01)Σ3.00(O11.41F0.59)Σ12

Geological Setting of Type Material:

Lazulite-bearing metaquartzite horisont of the Itremo Group

Associated Minerals at Type Locality:

Reference:

Rondeau, B., Devouard, B., Jacob, D., Roussel, P., Stephant, N., Boulet, C., Mollé, V., Corre, M., Fritsch, E. & Ferraris, C. (2019) Lasnierite, (Ca,Sr)(Mg,Fe)2Al(PO4)3, a new phosphate accompanying lazulite from Mt. Ibity, Madagascar: an example of structural characterization from dynamical refinement of precession electron diffraction data on submicrometre sample. European Journal of Mineralogy, 31 (2): 379-388.

Synonyms of LasnieriteHide

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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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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 LasnieriteHide

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References for LasnieriteHide

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Reference List:

Rondeau, B. , Fritsch, E. , Stéphant, N., Boulet, C., Chauviré, B. (2016) Gem lazulite-bearing blue quartzites from Itremo, Madagascar: A potential for new mineral species. 2nd European Mineralogical Congress, Rimini, Italy, 1p. DOI:10.13140/RG.2.2.18943.61608

Rondeau, B., Devouard, B., Jacob, D., Roussel, P., Stephant, N., Boulet, C., Mollé, V., Corre, M., Fritsch, E. & Ferraris, C. (2019) Lasnierite, (Ca,Sr)(Mg,Fe)2Al(PO4)3, a new phosphate accompanying lazulite from Mt. Ibity, Madagascar: an example of structural characterization from dynamical refinement of precession electron diffraction data on submicrometre sample. European Journal of Mineralogy, 31(2), 379-388.

Localities for LasnieriteHide

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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.