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Parascandolaite

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About ParascandolaiteHide

Formula:
KMgF3
Colour:
Colourless, white
Lustre:
Vitreous
Specific Gravity:
3.11
Crystal System:
Isometric
Name:
The mineral is named after the Italian mineralogist Antonio Parascandola (1902–1977).
The mineral, isotypic to cubic perovskites, is the natural analog of the synthetic fluoride KMgF3 and is related to neighborite, NaMgF3. Parascandolaite probably corresponds to unnamed mineral UM1960-02-F:KMg (Smith and Nickel, 2007).


Classification of ParascandolaiteHide

Approved
Approval Year:
2013

Physical Properties of ParascandolaiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless, white
Cleavage:
Perfect
on {100}
Density:
3.11(1) g/cm3 (Measured)    3.123 g/cm3 (Calculated)

Optical Data of ParascandolaiteHide

Type:
Isotropic
RI values:
n = 1.395(5)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Moderate

Chemical Properties of ParascandolaiteHide

Formula:
KMgF3

Crystallography of ParascandolaiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Pm3m
Setting:
Pm3m
Cell Parameters:
a = 4.0032(9) Å
Unit Cell V:
64.14 ų
Z:
1
Morphology:
Cubic crystals.
Twinning:
No twinning was observed.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.831 (83)
2.311 (78)
2.001 (100)
1.633 (35)
1.415 (56)
1.267 (16)
1.206 (22)
Comments:
Sample from the type locality.

Type Occurrence of ParascandolaiteHide

General Appearance of Type Material:
cubic crystals up to 0.5 mm in length
Place of Conservation of Type Material:
deposited in the Reference Collection of the Dipartimento di Chimica, Università degli Studi di Milano, Italy, specimen number 2013–2014
Geological Setting of Type Material:
volcanic sublimate at Vesuvius volcano on 1944 eruption lava scoria. Parascandolaite formed by reaction of the fumarolic gases containing hydrofluoric acid with the K-rich host rock.
Associated Minerals at Type Locality:

Synonyms of ParascandolaiteHide

Relationship of Parascandolaite to other SpeciesHide

Other Members of this group:
NeighboriteNaMgF3Orth. mmm (2/m 2/m 2/m)

Fluorescence of ParascandolaiteHide

No fluorescence was observed under either short- or long-wave ultraviolet radiation.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ParascandolaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Demartin, F., Campostrini, I., Castellano, C. and Russo, M. (2014): Parascandolaite, KMgF3, a new perovskite-type fluoride from Vesuvius. Physics and Chemistry of Minerals, 41, 403-407.

Internet Links for ParascandolaiteHide

Localities for ParascandolaiteHide

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 locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Brazil
 
  • Mato Grosso
    • Juína
      • Sorriso river
Kaminsky, F. V., Wirth, R., & Schreiber, A. (2015). A microinclusion of lower-mantle rock and other mineral and nitrogen lower-mantle inclusions in a diamond. The Canadian Mineralogist, 53(1), 83-104.; Kaminsky, F. V., Ryabchikov, I. D., & Wirth, R. (2015). A primary natrocarbonatitic association in the Deep Earth. Mineralogy and Petrology, 1-12.; Kaminsky, F.V., Wirth, R., Schreiber, A. (2015): A microinclusion of lower-mantle rock and other minerals and nitrogen lower-mantle inclusions in a diamond. Canadian Mineralogist: 53(1): 83-104
Italy (TL)
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Demartin, F., Campostrini, I., Castellano, C. and Russo, M. (2014): Parascandolaite, KMgF3, a new perovskite-type fluoride from Vesuvius. Physics and Chemistry of Minerals, 41, 403-407.; Demartin F., Campostrini I., Castellano C., Russo M. 2014. Parascandolaite, KMgF3, a new perovskite-type fluoride from Vesuvius. Phys. Chem. Min., published online: 8 April 2014.
Mineral and/or Locality  
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