Poppiite (original) (raw)

A valid IMA mineral species

About PoppiiteHide

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Formula:

Ca2V3+V3+2[Si2O6OH][SiO4](OH)2O

Colour:

Brown to greenish brown

Crystal System:

Monoclinic

Name:

Named in honor of Luciano Poppi, Professor of Mineralogy, Modena and Reggio Emilia University, and "all his generous and fruitful efforts devoted to mineral science".

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:27576:1

2b981466-3799-48fa-b8b0-852a5b0af6a0

IMA Classification of PoppiiteHide

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IMA Formula:

Ca2V3+V3+2(Si2O7)(SiO4)(OH,O)2 · H2O

Type description reference:

Classification of PoppiiteHide

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9.BG.20

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

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 PoppiiteHide

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Colour:

Brown to greenish brown

Cleavage:

Very Good
{100} and {001}

Density:

3.36 g/cm3 (Measured) 3.44 g/cm3 (Calculated)

Optical Data of PoppiiteHide

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RI values:

_n_α = 1.768(9) _n_β = 1.804(8) _n_γ = 1.810(9)

δ = 0.042

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

Comments:

α = light yellowish brown
ß = deep greenish brown
γ = brown to reddish brown

Chemistry of PoppiiteHide

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Mindat Formula:

Ca2V3+V3+2[Si2O6OH][SiO4](OH)2O

Crystallography of PoppiiteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 19.2889(6) Å, b = 6.0444(2) Å, c = 8.8783(3) Å
β = 97.328(2)°

Ratio:

a:b:c = 3.191 : 1 : 1.469

Morphology:

Minute (0.1 to 0.6 mm) prismatic crystals.

Twinning:

Sometimes polysynthetic twinning

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0004139	Poppiite	Brigatti M F, Caprilli E, Marchesini M (2006) Poppiite, the V3+ end-member of the pumpellyite group: Description and crystal structure American Mineralogist 91 584-588		2006	Gambatesa mine, val Graveglia, Genova, Northern Italy	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Format: d/Å (I/%) (hkl)

Geological EnvironmentHide

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Type Occurrence of PoppiiteHide

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General Appearance of Type Material:

minute prismatic crystals up to 0.6 mm

Place of Conservation of Type Material:

Museo Mineralogico e Geologico Estene, GEMMA 1786 at the Modena and Reggio Emilia University, Italy.

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Brigatti, M.F., Caprilli, E., Marchesini, M. (2006) Poppiite, the V3+ end member of the pumpellyite group: Description and crystal structure. American Mineralogist: 91: 584-588.

Synonyms of PoppiiteHide

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Relationship of Poppiite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of PoppiiteHide

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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 PoppiiteHide

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References for PoppiiteHide

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Reference List:

Nagashima, M., Matsumoto, T., Yamada, T., Takizawa, M., and Momma, K. (2018) Crystal chemistry of poppiite, V-analogue of pumpellyite, from the Komatsu mine, Saitama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences: 113: 251-262.

Localities for PoppiiteHide

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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.