Minrecordite Mineral Data

General Minrecordite Information

Chemical Formula:

CaZn(CO3)2

Composition:

Molecular Weight = 225.49 gm

Calcium 17.77 % Ca 24.87 % CaO

Zinc 29.00 % Zn 36.10 % ZnO

Carbon 10.65 % C 39.04 % CO₂

Oxygen 42.57 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaZn(CO₃)₂

Environment:

Oxidation zone secondary mineral in carbonate-hosted zinc ores.

IMA Status:

Approved IMA 1982

Locality:

Tsumeb mine, Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named after the journal Mineralogical Record.

Name Pronunciation:

Minrecordite

Minrecordite Image

Images:

Click Here for Larger Minrecordite Image

Minrecordite Dioptase

Comments: Blue-green dioptase covered with minute, rhombic crystals of transparent minrecordite one mm or less in size.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Picture size 1 cm.
© John Veevaert

Images:

Minrecordite Wendwilsonite

Comments: Wendell Wilson, publisher, editor-in-chief of the Mineralogical Record, and the person whom wendwilsonite was named after, kindly provided the mineral name pronunciations for minrecordite and wendwilsonite.
Location: Tucson Convention Center, 50th Tucson Gem and Mineral Show, February 14, 2004. Scale: NA.
© Dave Barthelmy

Minrecordite Crystallography

Axial Ratios:

a:c = 1:3.32679

Cell Dimensions:

a = 4.8183, c = 16.0295, Z = 3; V = 322.28 Den(Calc)= 3.49

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.89(1), 1.789(0.4), 1.806(0.33),

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Forms: ( 1 0 1)

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Physical Properties of Minrecordite

Cleavage:

{1014} Perfect

Color:

Colorless, White.

Density:

3.45

Diaphaneity:

Transparent to Translucent

Hardness:

3.5-4 - Copper Penny-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Pearly

Streak:

white

Optical Properties of Minrecordite

Gladstone-Dale:

CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1862,KPDmeas= 0.1884,KC= 0.1916
Ncalc = 1.66 - 1.67

Optical Data:

Uniaxial (-), e=1.55, w=1.75, bire=0.2000.

Calculated Properties of Minrecordite

Electron Density:

Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Minrecordite =3.45 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Minrecordite= 16.57 barns/electron
U=PE_Minrecordite x rElectron Density= 55.79 barns/cc.

Radioactivity:

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

Minrecordite Classification

Dana Class:

14.02.01.04 (14)Anhydrous Carbonates

(14.02)with Compound Formula A+ B++ (CO3)2

(14.02.01)Dolomite Group (Trigonal: R-3)

14.02.01.01 Dolomite CaMg(CO3)2 R 3 3

14.02.01.02 Ankerite Ca(Fe,Mg,Mn)(CO3)2 R 3 3

14.02.01.03 Kutnohorite Ca(Mn,Mg,Fe)(CO3)2 R 3 3

14.02.01.04 Minrecordite CaZn(CO3)2 R 3 3

Strunz Class:

05.AB.10 05 - CARBONATES (NITRATES)

05.A - Carbonates without additional anions, without H2O

05.AB -Alkali-earth (and other M2+) carbonates

05.AB.10 Ankerite Ca(Fe,Mg,Mn)(CO3)2 R 3 3

05.AB.10 Dolomite CaMg(CO3)2 R 3 3

05.AB.10 Kutnohorite Ca(Mn,Mg,Fe)(CO3)2 R 3 3

05.AB.10 Minrecordite CaZn(CO3)2 R 3 3

Other Minrecordite 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 Minrecordite :
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
15 - WWW-MINCRYST

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Ask about Minrecordite 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 Español

Print or Cut-and-Paste your Minrecordite Specimen Label here :

Minrecordite

CaZn(CO3)2
Dana No: 14.02.01.04 Strunz No: 05.AB.10
Locality:

Notes: