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Peretaite Mineral Data

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General Peretaite Information

Help on Chemical  Formula: Chemical Formula: CaSb+++4O4(OH)2(SO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 853.25 gm
   Calcium    4.70 %  Ca    6.57 % CaO
   Antimony  57.08 %  Sb   68.33 % Sb2O3
   Hydrogen   0.71 %  H     6.33 % H2O
   Sulfur     7.52 %  S    18.77 % SO3
   Oxygen    30.00 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaSb4O4(OH)2(SO4)2•2(H2O)
Help on Environment: Environment: Secondary mineral in vugs in an antimony-bearing vein in silicified limestone.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Pereta, Tuscany, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Peretaite + Pronunciation Say PERETAITE
Help on Synonym: Synonym: ICSD 100339
  PDF 33-264

Peretaite Image

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Comments: Clear, tabular, bladed, stellate spray of transparent peretaite crystals.
Location: Pereta mine, Scansano, Tuscany, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Peretaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.4017:1:1.8185
Help on Cell Dimensions: Cell Dimensions: a = 24.641, b = 5.598, c = 10.18, Z = 4; beta = 95.95° V = 1,396.67 Den(Calc)= 4.06
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.19(1), 3.06(0.67), 2.451(0.31),

Physical Properties of Peretaite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 4.06
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Peretaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.2071,KC= 0.2073
Ncalc = 1.84
Help on Optical Data: Optical Data: Biaxial (+), b=1.841

Calculated Properties of Peretaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.71 gm/cc
note: Specific Gravity of Peretaite =4.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007721997
Boson Index = 0.9992278003
Help on Photoelectric: Photoelectric: PEPeretaite = 184.76 barns/electron
U=PEPeretaite x rElectron Density= 685.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Peretaite is Not Radioactive

Peretaite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.06)where (A+ B++)5 (XO4)2 Zq�x(H2O)
  (31.06.04)Dana Group Peretaite CaSb4O4(OH)2(SO4)2•2(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: 07.DF.45 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DF -With large and medium-sized cations
07.DF.45 Peretaite CaSb4O4(OH)2(SO4)2•2(H2O) C 2/c 2/m

Other Peretaite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Peretaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.DF.45





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