Fluorvesuvianite Mineral Data

Fluorvesuvianite Mineral Data

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General Fluorvesuvianite Information

Chemical Formula:

Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10

Composition:

Molecular Weight = 2,912.65 gm

Calcium 26.19 % Ca 36.64 % CaO

Magnesium 1.16 % Mg 1.92 % MgO

Manganese 0.08 % Mn 0.10 % MnO

Aluminum 9.59 % Al 18.12 % Al₂O₃

Iron 2.21 % Fe 2.84 % FeO

Silicon 17.37 % Si 37.15 % SiO₂

Hydrogen 0.06 % H 0.51 % H₂O

Oxygen 38.69 % O

Fluorine 4.67 % F 4.67 % F

- % F -1.97 % -O=F₂

______ ______

100.00 % 99.98 % = TOTAL OXIDE

Empirical Formula:

Ca_19.03Al_10.35Mg_1.39Fe²⁺_1.15Mn²⁺_0.04Si_18.01O₆₈F_7.16(OH)_1.64O_0.8

Environment:

Found in cavities of chloritized diopside skarn.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Lupikko iron mine, Pitkaranta, Karelia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the fluorine-dominant analog of vesuvainite.

Synonym:

IMA2000-037

Fluorvesuvianite Image

Images:

Fluorvesuvianite

Comments: Acicular crystals of fluorvesuvianite in a clear, calcite matrix. (CanMin, v 41, p 1375).
Location: Lupikko iron mine, Pitkaranta, Karelia, Russia. Scale: Picture size 1.2 cm.
© Canadian Mineralogist

Fluorvesuvianite Crystallography

Axial Ratios:

a:c = 1:0.75944

Cell Dimensions:

a = 15.51, c = 11.779, Z = 2; V = 2,833.56 Den(Calc)= 3.41

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nnc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.453(1)(620), 2.589(0.5)(224,522), 2.743(0.9)(432,440),2.945(0.35)(004), 3.04(0.3)(510), 3.465(0.3)(420), 4.74(0.2)(202),

Crystal Structure:

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Britvin S N , Antonov A A , Krivovichev S V , Armbruster T , Burns P C , Chukanov N V , The Canadian Mineralogist , 41 (2003) p.1371-1380, Fluorvesuvianite, Ca19(Al,Mg,Fe)13[SiO4]10[Si2O7]4O(F,OH)9, a new mineral species, from Pitkaranta, Karelia, Russia: Description and crystal structure, Locality: Pitkaranta, Karelia, Russia

Physical Properties of Fluorvesuvianite

Cleavage:

None

Color:

Colorless, Silky white.

Density:

3.46

Diaphaniety:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Fluorvesuvianite

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2054,KPDmeas= 0.2025,KC= 0.205

Optical Data:

Uniaxial (-), e=1.699, w=1.702, bire=0.0030.

Calculated Properties of Fluorvesuvianite

Electron Density:

r_electron=3.38 gm/cc
note: r_{Fluorvesuvianite}=3.41 gm/cc.

Fermion Index

Fermion Index = 0.01027
Boson Index = 0.98973

Photoelectric:

PE_{Fluorvesuvianite}= 4.89 barns/electron
U=PE_{Fluorvesuvianite} x r_electron= 16.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fluorvesuvianite is Not Radioactive

Fluorvesuvianite Classification

Dana Class:

58.2.4.3 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.2)with cations in [6] and higher coordination; single and double groups (n=1,2)

(58.2.4)Vesuvianite Group

58.2.4.1 Vesuvianite Ca10Mg2Al4(SiO4)5(Si2O7)2(OH)4 P 4/n 4/m

58.2.4.2 Wiluite! Ca19(Al,Mg,Fe,Ti)13(B,Al,[])5Si18O68(O,OH)10 P 4/nnc 4/m 2/m 2/m

58.2.4.3 Fluorvesuvianite ! Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10 P 4/nnc 4/m 2/m 2/m

58.2.4.4 Manganvesuvianite! Ca19Mn(Al,Mn,Fe)10(Mg,Mn)2Si18O69(OH)9 P 4/n 4/m

Strunz Class:

VIII/C.26-05 VIII - Silicates

VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups

VIII/C.26 - Vesuvianite series

VIII/C.26-03 Manganvesuvianite! Ca19Mn(Al,Mn,Fe)10(Mg,Mn)2Si18O69(OH)9 P 4/n 4/m

VIII/C.26-05 Fluorvesuvianite Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10 P 4/nnc 4/m 2/m 2/m

VIII/C.26-10 Vesuvianite Ca10Mg2Al4(SiO4)5(Si2O7)2(OH)4 P 4/n 4/m

VIII/C.26-20 Wiluite! Ca19(Al,Mg,Fe,Ti)13(B,Al,[])5Si18O68(O,OH)10 P 4/nnc 4/m 2/m 2/m

Other Fluorvesuvianite Information

References:

NAME( CanMin, v 41, p 1371) PHYS. PROP.(CanMin, v 41, p 1371) OPTIC PROP.(CanMin, v 41, p 1371)

See Also:

Links to other databases for Fluorvesuvianite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Fluorvesuvianite

Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10
Dana No: 58.2.4.3 Strunz No: VIII/C.26-05
Locality:

Notes: