Osakaite Mineral Data
General Osakaite Information
Chemical Formula: Zn4SO4(OH)6•5H2O
Composition: Molecular Weight = 548.75 gm
Zinc 44.69 % Zn 55.62 % ZnO
Copper 2.78 % Cu 3.48 % CuO
Hydrogen 2.93 % H 26.17 % H2 O
Sulfur 5.90 % S 14.74 % SO3
Oxygen 43.71 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula: Zn3.75 Cu0.24 (SO4 )1.01 (OH)5.96 •4.99(H2 O)
Environment: Found in gallery walls and in cracks in Jurassic shales (Cu, Zn, Pb, Fe, and Mn deposits). New structure type. Dehydrates to namuwite.
IMA Status: Approved IMA 2006 (Dana # Added)
Locality: Hirao mine, Minoo (Minoh) City, Osaka Prefecture, Japan Link to MinDat.org Location Data.
Name Origin: Named after the locality.
Osakaite Crystallography
Axial Ratios: a:b:c =1.0025:1:1.3226
Cell Dimensions: a = 8.358, b = 8.337, c = 11.027, Z = 2; alpha = 94.97°, beta = 83.16°, gamma = 119.6° V = 660.84 Den(Calc)= 2.76
Crystal System: Triclinic - Pinacoidal 1 ) Space Group: P1
X Ray Diffraction: By Intensity(I/Io ): 10.96(1), 2.562(0.9), 2.663(0.8), 3.229(0.8), 2.717(0.21), 1.574(0.18), 3.642(0.17), 5.47(0.16),
Physical Properties of Osakaite
Cleavage: {001} Perfect
Color: White, Pale blue.
Density: 2.7
Fracture: Flexible - Flexible fragments.
Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Habit: Platy - Sheet forms (e.g. micas).
Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).
Hardness: 1 - Talc
Luster: Vitreous (Glassy)
Streak: white or pale blue
Optical Properties of Osakaite
Gladstone-Dale: CI meas = 0.016 (Superior) - where the CI = (1-KPDmeas /KC ) calc = 0.034 (Excellent) - where the CI = (1-KPDcalc /KC )PDcalc = 0.2017,KPDmeas = 0.2054,KC = 0.2088
Optical Data: Biaxial (-), a=1.532, b=1.565, g=1.567, bire=0.0350
Calculated Properties of Osakaite
Electron Density: Bulk Density (Electron Density)=2.67 gm/cc
Fermion Index: Fermion Index = 0.01
Photoelectric: PEOsakaite = 23.22 barns/electronU=PEOsakaite x r Electron Density= 62.05 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)Not Radioactive
Osakaite Classification
Dana Class: 31.01.06.03 (31) Hydrated Sulfates Containing Hydroxyl or Halogen
(31.01) where (A+ B++)m (XO4)p Zq�x(H2O), where m:p>6:1
(31.01.06) Schulenbergite group
31.01.06.01 Schulenbergite (Cu,Zn)7(SO4,CO3)2(OH)10•3(H2O) Hex Hex
31.01.06.02 Bechererite ! (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2 P 3 3
31.01.06.03 Osakaite ! Zn4SO4(OH)6•5H2O P1 1
31.01.06.04 Zn-Schulenbergite ! (Zn,Cu)7(SO4,CO3)2(OH)10•3(H2O) Hex Hex
Strunz Class: 07.DE.40 07 - SULFATES (SELENATES, TELLURATES)
07.D - Sulfates (selenates, etc.) with additional anions, with H2O
07.DE -With only medium-sized cations; unclassified
07.DE.40 Osakaite ! Zn4SO4(OH)6•5H2O P1 1
Other Osakaite Information
References: NAME( AmMin, v93:1688) PHYS. PROP.(AmMin, v93:1688) OPTIC PROP.(AmMin, v93:1688)
See Also: Links to other databases for Osakaite : Am. Min. Crystal Structure Database Athena GeoScienceWorld Google Images Google Scholar MinDAT Mineralienatlas (Deutsch) Online Mineral Museum QUT Mineral Atlas Ruff.Info Search for Osakaite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Osakaite :
Ask about Osakaite here : Ask-A-Mineralogist from the Mineralogical Society of AmericaMindat.org's Discussion GroupsOriginal Rockhounds Discussion GroupRockhounds Discussion Group on Yahoo GroupsMineral Discussion Forum from Fabre Minerals - also available in
Español
Print or Cut-and-Paste your Osakaite Specimen Label here :
Osakaite
Zn4SO4(OH)6•5H2O Dana No: 31.01.06.03 Strunz No: 07.DE.40 Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.
Chemical Formula: