Lombardoite R220033

Name: Lombardoite
RRUFF ID: R220033
Ideal Chemistry: Ba2Mn3+(AsO4)2(OH)
Locality: Valletta mine, Maira Valley, Piedmont, Italy
Source: Fernando Cámara
Owner: Fernando Cámara
Description: Dark red platy tablets associated with quartz. Type sample from Cámara et al (2022)
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Brackebuschite (17) ]
RRUFF ID: R220033.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Ba1.96Sr0.17Pb0.04Na0.02Ca0.02)(Mn3+0.62Fe3+0.13Al0.06Mg0.11)[(As0.87V0.12P0.01)O4]2(OH)
Sample Description: Unoriented sample
X Min:    X Max:    X Sort:
RRUFF ID: R220033
Sample Description: Cell parameters are from powder data, profile is calculated
Cell Refinement Output: a: 7.883(2)Å    b: 6.146(1)Å    c: 9.101(2)Å
alpha: 90°    beta: 112.52(1)°    gamma: 90°   Volume: 407.3(2)Å3    Crystal System: monoclinic
  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

X Min:    X Max:    X Sort:
REFERENCES for Lombardoite

Hålenius U, Hatert F, Pasero M, Mills S J (2016) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 33. New minerals and nomenclature modifications approved in 2016, Mineralogical Magazine, 80, 1135-1144   [view file]

Cámara F, Baratelli l, Ciriotti M E, Nestola F, Piccoli G C, Bosi F, Bittarello E, Hålenius U, Balestra C (2022) As-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: IV. Lombardoite, Ba2Mn3+(AsO4)2(OH) and aldomarinoite, Sr2Mn3+(AsO4)2(OH), description and crystal structure, Mineralogical Magazine, 86, 447-458

Celestian A J (2023) New mineral names: Arsenic and lead, American Mineralogist, 108, 634-636   [view file]