Voltaite Mineral Data

Voltaite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Crystalarium.com
[Minerals] [Gems] [Sale Items] [Gold Rings] [Big Stuff] [Main Page]
Shop early for Holiday Season and get the best stuff.
You can put it on layaway for up to six weeks!


General Voltaite Information

Help on Chemical Formula: Chemical Formula: K2Fe++5Fe+++3Al(SO4)12•18(H2O)
Help on Composition: Composition: Molecular Weight = 2,028.99 gm
   Potassium   3.85 %  K     4.64 % K2O
   Aluminum    1.33 %  Al    2.51 % Al2O3
   Iron       22.02 %  Fe   17.70 % FeO / 11.81 % Fe2O3
   Hydrogen    1.79 %  H    15.98 % H2O
   Sulfur     18.96 %  S    47.35 % SO3
   Oxygen     52.04 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Fe2+5Fe3+3Al(SO4)12•18(H2O)
Help on Environment: Environment: Solfatara and fumaroles associated with volcanic activity and continental evaporite deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Pozzuoli near Naples, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Italian physicist, Alessandro G. A. A. Volta (1745-1841).
Help on Name Pronunciation: Name Pronunciation: Voltaite Say VOLTAITE
Help on Synonym: Synonym: ICSD 9254
  Monsmedite
  PDF 20-1388
 

Voltaite Image

Click Here for Larger Voltaite Image in a New Browser Window Images:
Click Here for Larger Voltaite Image

Voltaite   Alunogen

Comments: Dark greenish-black crystals of voltaite on white alunogen.
Location: Carola Mine, Freital, Dresden, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag
Click Here for Larger Voltaite Image in a New Browser Window Images:
Click Here for Larger Voltaite Image

Voltaite   Szomolnokite

Comments: Whitish crystalline crust of voltaite on crystals of brown szomolnokite.
Location: Alcaparrosa Mine, Cerritos Bayos, Chile. Scale: Picture size 1 cm.
© John Veevaert

Voltaite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 27.178, Z = 16; V = 20,074.86 Den(Calc)= 2.69
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.54(1), 3.41(0.9), 5.57(0.7),
Click Here for Large Voltaite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Mereiter K , Tschermaks Mineralogische und Petrographische Mitteilungen , 18 (1972) p.185-202, Die kristallstruktur des voltaits, K2Fe2+5Fe3+3Al[SO4]12*18H2O

 

Physical Properties of Voltaite

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish black, Dark green, Olive green, Black.
Help on Density: Density: 2.6 - 2.8, Average = 2.7
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Silky
Help on Streak: Streak: grayish green
 

Optical Properties of Voltaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2232,KPDmeas= 0.2224,KC= 0.2229
Ncalc = 1.58 - 1.62
Help on Optical Data: Optical Data: Isotropic, n=1.593-1.608.
 

Calculated Properties of Voltaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.69 gm/cc
note: Specific Gravity of Voltaite =2.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.006347623
Boson Index = 0.993652377
Help on Photoelectric: Photoelectric: PEVoltaite = 8.02 barns/electron
U=PEVoltaite x relectron= 21.59 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 55.65 (Gamma Ray American Petroleum Institute Units)
Concentration of Voltaite per GRapi unit = 1.80 (%)

Estimated Radioactivity from Voltaite - barely detectable

 

Voltaite Classification
Help on Dana Class: Dana Class: 29.09.01.01 (29)Hydrated Acid and Sulfates
  (29.09)with miscellaneous formulae
  (29.09.01)Voltaite Group
 
29.09.01.01 Voltaite K2Fe5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m
 
29.09.01.02 Zincovoltaite K2Zn5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m
 
29.09.01.03 Pertlikite! K2(Fe,Mg)2(Mg,Fe)4Fe2Al(SO4)12•18H2O I 41/acd 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: 07.CC.25 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
 
07.CC.25 Monsmedite? H8K2Tl2(SO4)8•11(H2O) F d3c 4/m 3 2/m
 
07.CC.25 Voltaite K2Fe5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m
 
07.CC.25 Zincovoltaite K2Zn5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m
 
07.CC.25 Pertlikite! K2(Fe,Mg)2(Mg,Fe)4Fe2Al(SO4)12•18H2O I 41/acd 4/m 2/m 2/m
 

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

Search for Voltaite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Voltaite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Voltaite Mineral Data :

Ask about Voltaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Voltaite Specimen Label here :

Voltaite

K2Fe++5Fe+++3Al(SO4)12•18(H2O)
Dana No: 29.09.01.01 Strunz No: 07.CC.25
Locality:

 

Notes: