Manuelarossiite
A valid IMA mineral species
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Manuela Rossi
Formula:
PbCaAlF7
Colour:
colorless
Lustre:
Adamantine
Hardness:
2 - 3
Specific Gravity:
5.095 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honour of Manuela Rossi (born 28 November 1977), mineralogist and gemologist at Universita' Degli Studi Di Napoli, Federico II, Italy.
Unique Identifiers
Mindat ID:
470611
Long-form identifier:
mindat:1:1:470611:9
IMA Classification of Manuelarossiite
Approved
IMA Formula:
Pb2+CaAlF7
Approval history:
IMA no. 2022-097
Type description reference:
Classification of Manuelarossiite
3.AB.
3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mnrs | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Manuelarossiite
Adamantine
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
2 - 3 on Mohs scale
Comment:
by analogy with other lead aluminofluorides (e.g., aravaipaite, artroeite, calcioaravaipaite).
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Fracture:
Micaceous
Comment:
laminated
Density:
5.095 g/cm3 (Calculated)
Chemistry of Manuelarossiite
Mindat Formula:
PbCaAlF7
Element Weights:
Elements listed:
Crystallography of Manuelarossiite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 7.6754(3) Å, b = 7.4443(4) Å, c = 9.2870(5) Å
β = 93.928(5)°
β = 93.928(5)°
Ratio:
a:b:c = 1.031 : 1 : 1.248
Unit Cell V:
529.39 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Twinning along {001} is observed.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.265 Å | (78) |
| 4.532 Å | (79) |
| 3.722 Å | (74) |
| 3.627 Å | (100) |
| 3.584 Å | (81) |
| 3.454 Å | (83) |
| 3.419 Å | (96) |
| 2.669 Å | (55) |
Type Occurrence of Manuelarossiite
General Appearance of Type Material:
very rare tabular crystals, up to 0.06 x 0.04 x 0.015 mm (but usually much smaller),
Place of Conservation of Type Material:
The holotype specimen is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia with the registration number 5920/1.
Geological Setting of Type Material:
Scoria from a vocanic fumerole.
manuelarossiite was probably formed not as a result of direct crystallization from gaseous phases but as a product of the interactions between earlierformed high-temperature sublimate Pb-bearing minerals (anglesite, cerussite, cotunnite,
matlockite, napoliite), HF-containing fumarolic gas and atmospheric water vapor at relatively low temperatures, presumably not higher than 150° C.
manuelarossiite was probably formed not as a result of direct crystallization from gaseous phases but as a product of the interactions between earlierformed high-temperature sublimate Pb-bearing minerals (anglesite, cerussite, cotunnite,
matlockite, napoliite), HF-containing fumarolic gas and atmospheric water vapor at relatively low temperatures, presumably not higher than 150° C.
Associated Minerals at Type Locality:
Other Language Names for Manuelarossiite
Dutch:Manuelarossiiet
German:Manuelarossiit
Related Minerals - Strunz-mindat Grouping
| 3.AB. | Fluorocronite | PbF2 |
| 3.AB.05 | Tolbachite | CuCl2 |
| 3.AB.10 | Coccinite | HgI2 |
| 3.AB.15 | Sellaite | MgF2 |
| 3.AB.20 | Lawrencite | (Fe2+,Ni)Cl2 |
| 3.AB.20 | Scacchite | MnCl2 |
| 3.AB.20 | Chloromagnesite | MgCl2 |
| 3.AB.25 | Fluorite | CaF2 |
| 3.AB.25 | Frankdicksonite | BaF2 |
| 3.AB.25 | Strontiofluorite | SrF2 |
| 3.AB.30 | Tveitite-(Y) | (Y, Na)6Ca6Ca6(Ca,Na)F42 |
| 3.AB.35 | Gagarinite-(Y) | NaCaYF6 |
| 3.AB.35 | Polezhaevaite-(Ce) | NaSrCeF6 |
| 3.AB.35 | Gagarinite-(Ce) | Na(REExCa1-x)(REEyCa1-y)F6 |
| 3.AB.37 | Calcioaravaipaite | PbCa2AlF9 |
| 3.AB.85 | Cotunnite | PbCl2 |
Fluorescence of Manuelarossiite
No fluorescence is observed under long- or short-wave ultraviolet light.
Other Information
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 Manuelarossiite
mindat.org URL:
https://www.mindat.org/min-470611.html
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References for Manuelarossiite
Localities for Manuelarossiite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Italy | |
| Kasatkin et al. (2023) |
| Bosi et al. (2023) |
