Mallardite Mineral Data

General Mallardite Information

Chemical Formula:

Mn++SO4•7(H2O)

Composition:

Molecular Weight = 277.11 gm

Manganese 19.83 % Mn 25.60 % MnO

Hydrogen 5.09 % H 45.51 % H₂O

Sulfur 11.57 % S 28.89 % SO₃

Oxygen 63.51 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺(SO₄)•7(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1879

Locality:

Locky Boy mine, Butterfield Canyon, Salt Lake County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

Name for Ernest Mallard (1833-1894), French crystallographer.

Name Pronunciation:

Mallardite + Pronunciation

Synonym:

Zinc-fauserite - probably Zn-Mg-bearing mallardite

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Mallardite Crystallography

Axial Ratios:

a:b:c =2.1769:1:1.7015

Cell Dimensions:

a = 14.15, b = 6.5, c = 11.06, Z = 4; beta = 105.6° V = 979.77 Den(Calc)= 1.88

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 4.92(1), 5.49(0.7), 4.88(0.55),

Physical Properties of Mallardite

Cleavage:

{001} Good

Color:

Colorless, White, Light pink.

Density:

1.846

Diaphaneity:

Transparent

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Mallardite

Gladstone-Dale:

CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2484,KPDmeas= 0.253,KC= 0.2563
Ncalc = 1.47 - 1.48

Optical Data:

Biaxial (+), a=1.462, b=1.465, g=1.474, bire=0.0120

Calculated Properties of Mallardite

Electron Density:

Bulk Density (Electron Density)=1.91 gm/cc
note: Specific Gravity of Mallardite =1.85 gm/cc.

Fermion Index:

Fermion Index = 0.0011803621
Boson Index = 0.9988196379

Photoelectric:

PE_Mallardite= 5.59 barns/electron
U=PE_Mallardite x rElectron Density= 10.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mallardite is Not Radioactive

Mallardite Classification

Dana Class:

29.06.10.05 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 · x(H2O)

(29.06.10)Melanterite Group (Heptahydrates, Monoclinic: P21/c)

29.06.10.01 Melanterite FeSO4•7(H2O) P 2₁/c 2/m

29.06.10.02 Boothite CuSO4•7(H2O) P 2₁/c 2/m

29.06.10.03 Zincmelanterite (Zn,Cu,Fe)SO4•7(H2O) P 2₁/c 2/m

29.06.10.04 Bieberite CoSO4•7(H2O) P 2₁/c 2/m

29.06.10.05 Mallardite MnSO4•7(H2O) P 2₁/c 2/m

29.06.10.06 Alpersite! (Mg,Cu)SO4•7H2O P 2₁/c 2/m

Strunz Class:

07.CB.35 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CB -With only medium-sized cations

07.CB.35 Bieberite CoSO4•7(H2O) P 2₁/c 2/m

07.CB.35 Boothite CuSO4•7(H2O) P 2₁/c 2/m

07.CB.35 Mallardite MnSO4•7(H2O) P 2₁/c 2/m

07.CB.35 Melanterite FeSO4•7(H2O) P 2₁/c 2/m

07.CB.35 Zincmelanterite (Zn,Cu,Fe)SO4•7(H2O) P 2₁/c 2/m

07.CB.35 Alpersite! (Mg,Cu)SO4•7H2O P 2₁/c 2/m

Other Mallardite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Mallardite :
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 Mallardite Specimen Label here :

Mallardite

Mn++SO4•7(H2O)
Dana No: 29.06.10.05 Strunz No: 07.CB.35
Locality:

Notes: