Minasgeraisite-(Y) R120134

Name: Minasgeraisite-(Y)
RRUFF ID: R120134
Ideal Chemistry: CaBe2Y2Si2O10
Locality: Jaguaraçu, Minas Gerais, Brazil
Source: Luiz Menezes [view label]
Owner: RRUFF
Description: Purple crystals on muscovite, associated with milarite R120135
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Gadolinite (18) ]
Sample Description: Unoriented sample

  To download sample data,
  please select a specific
  orientation angle.

Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
RRUFF ID: R120134
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R120134.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 10.126(8)Å    b: 7.763(6)Å    c: 4.842(4)Å
alpha: 90°    beta: 90.22(3)°    gamma: 90°   Volume: 380.6(1)Å3    Crystal System: monoclinic

X Min:    X Max:    X Sort:
REFERENCES for Minasgeraisite-(Y)

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Foord E E, Gaines R V, Crock J G, Simmons W B, Barbosa C P (1986) Minasgeraisite, a new member of the gadolinite group from Minas Gerais, Brazil, American Mineralogist, 71, 603-607   [view file]

Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist, 72, 1031-1042   [view file]

Bačík P, Miyawaki R, Atencio D, Cámara F, Fridrichová (2017) Nomenclature of the gadolinite supergroup, European Journal of Mineralogy, 29, 1067-1082

Cooper M A, Hawthorne F C (2018) Cation order in the crystal structure of 'minasgeraisite-(Y)', Mineralogical Magazine, 82, 301-312

Atencio D (2023) Minasgeraisite-(Y) discredited as an ordered intermediate between datolite and hingganite-(Y), Mineralogical Magazine, 87, 738-740

Bosi F, Hatert F, Pasero M, Mills S J (2023) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 73, European Journal of Mineralogy, 35, 397-402   [view file]

Vereshchagin O S, Gorelova L A, Shagova A K, Kasatkin, Škoda R, Bocharov V N, Vlasenko N S, Vašinová Galiová M (2023) Re-investigation of 'minasgeraisite-(Y)' from the Jaguaraçu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals, Mineralogical Magazine, 87, 470-479