Mineralogy Database

Mendozite Mineral Data

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General Mendozite Information

Help on Chemical  Formula: Chemical Formula: NaAl(SO4)2•11(H2O)
Help on Composition: Composition: Molecular Weight = 440.27 gm
   Sodium     5.22 %  Na    7.04 % Na2O
   Aluminum   6.13 %  Al   11.58 % Al2O3
   Hydrogen   5.04 %  H    45.01 % H2O
   Sulfur    14.57 %  S    36.37 % SO3
   Oxygen    69.05 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaAl(SO4)2•11(H2O)
Help on Environment: Environment: Oxidation of pyrite in reaction with clays,
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1868
Help on Locality: Locality: "San Juan, near Mendoza" [probably meaning Mendoza Province; the original occurrence appears lost.], Argintina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Mendozite + Pronunciation Say MENDOZITE
Help on Synonym: Synonym: ICSD 26005
  PDF 22+475

Mendozite Image

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Comments: White chalky massive mendozite.
Location: Gold Bottom Mine, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mendozite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.388:1:0.911
Help on Cell Dimensions: Cell Dimensions: a = 21.75, b = 9.108, c = 8.298, Z = 4; beta = 92.47° V = 1,642.30 Den(Calc)= 1.78
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): 3.5(1), 4.76(0.85), 4.58(0.65),

Physical Properties of Mendozite

Help on Cleavage: Cleavage: {100} Good, {001} Indistinct, {010} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.73 - 1.765, Average = 1.74
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Mendozite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2571,KPDmeas= 0.2619,KC= 0.2548
Ncalc = 1.44 - 1.45
Help on Optical Data: Optical Data: Biaxial (-), a=1.449, b=1.461, g=1.463, bire=0.0140, 2V(Calc)=44, 2V(Meas)=56.

Calculated Properties of Mendozite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.86 gm/cc
note: Specific Gravity of Mendozite =1.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014314753
Boson Index = 0.9985685247
Help on Photoelectric: Photoelectric: PEMendozite = 1.26 barns/electron
U=PEMendozite x rElectron Density= 2.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mendozite is Not Radioactive

Mendozite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.05)where A B (XO4)2 � x(H2O)
  (29.05.04)Dana Group Mendozite NaAl(SO4)2•11(H2O) C 2/c 2/m Kalinite KAl(SO4)2•11(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: 07.CC.15 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
07.CC.15 Mendozite NaAl(SO4)2•11(H2O) C 2/c 2/m
07.CC.15 Kalinite KAl(SO4)2•11(H2O) C 2/c 2/m

Other Mendozite 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 Mendozite :
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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Print or Cut-and-Paste your Mendozite Specimen Label here :


Dana No: Strunz No: 07.CC.15





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