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Fluorlamprophyllite R130421

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Name: Fluorlamprophyllite
RRUFF ID: R130421
Ideal Chemistry: (SrNa)Ti2Na3Ti(Si2O7)2O2F2
Locality: Pocos de Caldas Plateau, Minas Gerais, Brazil
Source: Gunnar Farber [view label]
Owner: RRUFF
Description: Aggregates of bladed brownish-orange crystals, associated with natrolite, aegerine, analcime, nepheline, and microcline. Type specimen.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Lamprophyllite (9) ]
CHEMISTRY 
RRUFF ID: R130421.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Na2.30Mn0.54Mg0.16)Σ3.00(Sr1.35Na0.33Ca0.15K0.08)Σ1.91(Ti2.63Fe0.24Al0.03)Σ2.90Si3.89O16[F1.15(OH)0.85]Σ2.00
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R130421
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R130421.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 19.255(2)Å    b: 7.0715(7)Å    c: 5.3807(6)Å
alpha: 90°    beta: 96.794(2)°    gamma: 90°   Volume: 727.5(1)Å3    Crystal System: monoclinic
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REFERENCES for Fluorlamprophyllite

Williams P A, Hatert F, Pasero M, Mills S J (2014) IMA Commission on new minerals, nomenclature and classification (CNMNC) Newsletter 19. New minerals and nomenclature modifications approved in 2014, Mineralogical Magazine, 78, 165-170   [view file]

Rastsvetaeva R K, Chukanov N V, Aksenov S M (2016) The crystal chemistry of lamprophyllite-related minerals: a review, European Journal of Mineralogy, 28, 915-930

Andrade M B, Yang H, Downs R T, Färber G, Filho R R C, Evans S H, Loehn C W, Schumer B N (2018) Fluorlamprophyllite, Na3(SrNa)Ti3(Si2O7)2O2F2, a new mineral from Poços de Caldas alkaline massif, Morro do Serrote, Minas Gerais, Brazil, Mineralogical Magazine, 82, 121-131   [view file]

Belakovskiy D I, Cámara F, Uvarova Y (2019) New mineral names, American Mineralogist, 104, 1360-1364   [view file]