Mineralogy Database

Fuenzalidaite Mineral Data

Search Webmineral :

General Fuenzalidaite Information

Help on Chemical  Formula: Chemical Formula: K6(Na,K)4Na6Mg10(SO4)12(IO3)12•12(H2O)
Help on Composition: Composition: Molecular Weight = 4,191.42 gm
   Potassium   6.53 %  K     7.87 % K2O
   Sodium      4.94 %  Na    6.65 % Na2O
   Magnesium   5.80 %  Mg    9.62 % MgO
   Hydrogen    0.58 %  H     5.16 % H2O
   Sulfur      9.18 %  S    22.92 % SO3
   Iodine     36.33 %  I    47.78 % I2O5
   Oxygen     36.64 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K7Na9Mg10(SO4)12(IO3)12•12(H2O)
Help on Environment: Environment: In veins and veinlets of white nitrate ore called caliche blanco.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: A former nitrate mine about 1 km south of the former plant site of Oficina Santa Luisa, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Humberto Fuenzalida P. (1904-1966), who planned and directed the first school of geology at the University of Chile.
Help on Name Pronunciation: Name Pronunciation: Fuenzalidaite + Pronunciation Say FUENZALIDAITE
Help on Synonym: Synonym: ICSD 77416
  PDF 47-1851

Fuenzalidaite Image

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


Comments: SEM image of hexagonal (trigonal) crystals of fuenzalidaite. (AmMin, v79:1003).
Location: Nitrate mine about I km south of the former plant site of Oficina Santa Luisa, northern Chile. Scale: Scale Bar 10 µm.
© American Mineralogist

Fuenzalidaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.88832
Help on Cell Dimensions: Cell Dimensions: a = 9.4643, c = 27.336, Z = 1; V = 2,120.52 Den(Calc)= 3.28
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3c1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.927(1), 13.67(0.5), 3.023(0.41),

Physical Properties of Fuenzalidaite

Help on Cleavage: Cleavage: {110} Good
Help on Color: Color: White, Pale yellow.
Help on Density: Density: 3.31
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Fuenzalidaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.059 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1886,KPDmeas= 0.1869,KC= 0.1986
Ncalc = 1.65 - 1.66
Help on Optical Data: Optical Data: Uniaxial (-), e=1.615, w=1.622, bire=0.0070.

Calculated Properties of Fuenzalidaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Fuenzalidaite =3.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0066718756
Boson Index = 0.9933281244
Help on Photoelectric: Photoelectric: PEFuenzalidaite = 131.55 barns/electron
U=PEFuenzalidaite x relectron= 406.00 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 88.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Fuenzalidaite per GRapi unit = 1.13 (%)

Estimated Radioactivity from Fuenzalidaite - barely detectable


Fuenzalidaite Classification

Help on  Dana Class: Dana Class: (23)Compound Iodates
  (23.01)with miscellaneous formulae
  (23.01.02)Fuenzalidaite Group Fuenzalidaite K6(Na,K)4Na6Mg10(SO4)12(IO3)12•12(H2O) P 3c1 3 2/m Carlosruizite K6(Na,K)4Na6Mg10(SeO4)12(IO3)12•12(H2O) P 3c1 3 2/m George-ericksenite! Na6CaMg(IO3)6(CrO4)2•12(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: 07.DG.40 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
07.DG.40 Carlosruizite K6(Na,K)4Na6Mg10(SeO4)12(IO3)12•12(H2O) P 3c1 3 2/m
07.DG.40 Fuenzalidaite K6(Na,K)4Na6Mg10(SO4)12(IO3)12•12(H2O) P 3c1 3 2/m

Other Fuenzalidaite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.79,p1003-1008,1994) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Fuenzalidaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

Search for Fuenzalidaite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Fuenzalidaite :

Ask about Fuenzalidaite 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 Fuenzalidaite Specimen Label here :


Dana No: Strunz No: 07.DG.40





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.