Vlodavetsite Mineral Data

General Vlodavetsite Information

Chemical Formula: AlCa2(SO4)2F2Cl•4(H2O) Composition: Molecular Weight = 444.78 gm    Calcium   18.02 %  Ca   25.22 % CaO    Aluminum   6.07 %  Al   11.46 % Al₂O₃    Hydrogen   1.81 %  H    16.20 % H₂O    Sulfur    14.42 %  S    36.00 % SO₃    Chlorine   7.97 %  Cl    7.97 % Cl                -   %   Cl   -1.80 % -O=Cl₂       Oxygen    43.17 %  O    Fluorine   8.54 %  F     8.54 % F                -   %   F    -3.60 % -O=F₂                 ______        ______              100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: AlCa₂(SO₄)₂F₂Cl•4(H₂O) Environment: A product of fumarolic exhalations at temperatures below 100 deg. C. IMA Status: Approved IMA 1993 (Dana # Added) Locality: The Tolbachik Main Fracture eruption (Cone II of the Northern fissure), Kanchatka, Russia. Link to MinDat.org Location Data. Name Origin: Named for V. I. Vlodavets (1893-1993), Russian volcanologist. Name Pronunciation: Vlodavetsite + Pronunciation Synonym: ICSD 80437   IMA1993-023   PDF 85-2276  

Vlodavetsite Image

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Vlodavetsite Comments: Colorless, vitreous, massive vlodavetsite, rarely in irregular plates associated with calcite. Location: Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: See Image. © Rruff Database

Vlodavetsite Crystallography

Axial Ratios: a:c = 1:1.94355 Cell Dimensions: a = 6.856, c = 13.325, Z = 2; V = 626.34 Den(Calc)= 2.36 Crystal System: Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m X Ray Diffraction: By Intensity(I/I_o): 3.431(1), 3.335(0.8), 6.67(0.6), Forms:

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Crystal Structure:

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Starova G L , Filatov S K , Matusevich G L , Fundamensky V S , Mineralogical Magazine , 59 (1995) p.159-162, The crystal structure of vlodavetsite, AlCa2(SO4)2F2Cl*4H2O, Locality: Tolbachik Main Fracture Eruption, Kamchatka, Russia

 

Physical Properties of Vlodavetsite

Cleavage: {100} Perfect Color: Colorless, Yellow white. Density: 2.35 Diaphaneity: Transparent Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals. Habit: Platy - Sheet forms (e.g. micas). Habit: Tabular - Form dimensions are thin in one direction. Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Vlodavetsite

Gladstone-Dale: CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2193,KPDmeas= 0.2202,KC= 0.2247
Ncalc = 1.53 Optical Data: Uniaxial (+), w=1.509, e=1.526, bire=0.0170.  

Calculated Properties of Vlodavetsite

Electron Density: Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Vlodavetsite =2.35 gm/cc.
Fermion Index: Fermion Index = 0.0015346324
Boson Index = 0.9984653676 Photoelectric: PE_Vlodavetsite = 3.83 barns/electron
U=PE_Vlodavetsite x rElectron Density= 9.07 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vlodavetsite is Not Radioactive  

Vlodavetsite Classification

Dana Class: 31.08.05.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen   (31.08)where (A+ B++)3 (XO4)2 Zq·x(H2O)   (31.08.05)Dana Group  

31.08.05.01 Vlodavetsite! AlCa2(SO4)2F2Cl•4(H2O) I 4/m 4/m

Strunz Class: 07.DF.40 07 - SULFATES (SELENATES, TELLURATES)   07.D - Sulfates (selenates, etc.) with additional anions, with H2O   07.DF -With large and medium-sized cations  

07.DF.40 Lannonite HCa4Mg2Al4(SO4)8F9•32(H2O) Unk Tetra

 

07.DF.40 Vlodavetsite! AlCa2(SO4)2F2Cl•4(H2O) I 4/m 4/m

 

Other Vlodavetsite Information

References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p768,1996) OPTIC PROP.(MinRec) See Also: Links to other databases for Vlodavetsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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