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Goldichite Mineral Data

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General Goldichite Information

Help on Chemical  Formula: Chemical Formula: KFe+++(SO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 359.13 gm
   Potassium  10.89 %  K    13.11 % K2O
   Iron       15.55 %  Fe   22.23 % Fe2O3
   Hydrogen    2.25 %  H    20.07 % H2O
   Sulfur     17.86 %  S    44.59 % SO3
   Oxygen     53.46 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KFe3+(SO4)2•4(H2O)
Help on Environment: Environment: Cementing fragments in slope debris from an oxidizing pyritiferous Colorado Plateau-type uranium deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Dexter No. 7 mine, Calf Mesa, San Rafael district, Emery Co., Utah. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Samuel Stephen Goldich (1909-2000), American mineralogist, petrologist, and analytical isotope chemist, Professor of Geology, University of Minnesota, Minneapolis, Minneso ta, USA
Help on Name Pronunciation: Name Pronunciation: Goldichite + Pronunciation Say GOLDICHITE
Help on Synonym: Synonym: ICSD 22053
  PDF 11-428

Goldichite Image

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  Goldichite   Coquimbite   Ferricopiapite

Comments: Prismatic to fibrous crystals of goldichite on white massive coquimbite with yellow ferricopiapite.
Location: Dexter No. 7 Mine, Calf Mesa, San Rafael Swell, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Goldichite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9924:1:0.8689
Help on Cell Dimensions: Cell Dimensions: a = 10.45, b = 10.53, c = 9.15, Z = 4; beta = 101.817° V = 985.51 Den(Calc)= 2.42
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.068(1), 7.35(0.9), 10.29(0.8),

Physical Properties of Goldichite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Light yellow green.
Help on Density: Density: 2.43
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Streak: Streak: white

Optical Properties of Goldichite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2497,KPDmeas= 0.2487,KC= 0.2429
Ncalc = 1.59
Help on Optical Data: Optical Data: Biaxial (+), a=1.582, b=1.602, g=1.629, bire=0.0470, 2V(Calc)=84, 2V(Meas)=82.

Calculated Properties of Goldichite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.45 gm/cc
note: Specific Gravity of Goldichite =2.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0049090482
Boson Index = 0.9950909518
Help on Photoelectric: Photoelectric: PEGoldichite = 6.70 barns/electron
U=PEGoldichite x relectron= 16.42 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 158.35 (Gamma Ray American Petroleum Institute Units)
Concentration of Goldichite per GRapi unit = 0.63 (%)

Estimated Radioactivity from Goldichite - barely detectable


Goldichite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.05)where A B (XO4)2 � x(H2O)
  (29.05.02)Dana Group Goldichite KFe(SO4)2•4(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 07.CC.40 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
07.CC.40 Goldichite KFe(SO4)2•4(H2O) P 21/c 2/m

Other Goldichite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Goldichite :
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.CC.40





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