Johillerite Mineral Data (original) (raw)

General Johillerite Information

Help on Chemical Formula: Chemical Formula:

Na(Mg,Zn)3Cu(AsO4)3

Help on Composition: Composition:

Molecular Weight = 610.00 gm

Potassium 0.19 % K 0.23 % K2O

Sodium 2.90 % Na 3.91 % Na2O

Magnesium 8.69 % Mg 14.40 % MgO

Aluminum 0.27 % Al 0.50 % Al2O3

Zinc 1.39 % Zn 1.73 % ZnO

Iron 2.38 % Fe 3.40 % Fe2O3

Copper 16.15 % Cu 20.21 % CuO

Arsenic 36.36 % As 55.76 % As2O5

Phosphorus 0.20 % P 0.47 % P2O5

Oxygen 31.47 % O

______ ______

100.00 % 100.63 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na0.77K0.03Mg2.18Zn0.13Cu1.55Fe3+0.26Al0.06As2.96P0.04O12

Help on Environment: Environment:

Found in cavities in altered tennantite-chalcocite ore.

Help on IMA Status: IMA Status:

Approved IMA 1982

Help on Locality: Locality:

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

Help on Name Origin: Name Origin:

Named for Johannes Eric Hiller (1911-1972), professor of mineralogy, Stuttart, Germany.

Help on Name Pronunciation: Name Pronunciation:

Johillerite + Pronunciation Say JOHILLERITE

Help on Synonym: Synonym:

ICSD 63284

PDF 35-522

Johillerite Image

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

Click Here for Larger Johillerite Image Johillerite Comments: Violet-blue grains of johillerite on matrix. Location: Tolbachik Volcano, Kamchatka, Russia.Scale: Specimen Size 0.5x1 cm. © Diederik Visser

Johillerite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.53:1:0.8688

Help on Cell Dimensions: Cell Dimensions:

a = 6.752, b = 12.739, c = 11.068, Z = 4; beta = 100.37° V = 936.45 Den(Calc)= 4.33

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.75(1), 3.25(0.8), 4.06(0.5),1.66(0.5), 2.64(0.5), 1.682(0.4), 1.954(0.4), 3.5(0.4),

Click Here for Large Johillerite Structure Window Crystal Structure:

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| | Tait K T , Hawthorne F C , The Canadian Mineralogist , 42 (2004) p.717-722, Johillerite from Tolbachik, Kamchatka Peninsula, Russia: Crystal-structure, refinement and chemical composition, Locality: Tolbachik, Kamchatka Peninsula, Russia View Additional jPOWD Structure files for Johillerite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Johillerite

Help on Cleavage: Cleavage:

{010} Perfect, {100} Good, {001} Good

Help on Color: Color:

Violet.

Help on Density: Density:

4.15

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Habit: Habit:

Aggregates - Made of numerous individual crystals or clusters.

Help on Habit: Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Help on Hardness: Hardness:

3 - Calcite

Help on Luster: Luster:

Vitreous (Glassy)

Optical Properties of Johillerite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1725,KPDmeas= 0.18,KC= 0.1767
Ncalc = 1.73 - 1.77

Help on Optical Data: Optical Data:

Biaxial (+), a=1.715, b=1.743, g=1.783, bire=0.0680, 2V(Calc)=82, 2V(Meas)=80.

Calculated Properties of Johillerite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Johillerite =4.15 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0099134207
Boson Index = 0.9900865793

Help on Photoelectric: Photoelectric:

PEJohillerite = 34.09 barns/electron
U=PEJohillerite x relectron= 132.61 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 2.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Johillerite per GRapi unit = 38.63 (%)

Estimated Radioactivity from Johillerite - barely detectable

Johillerite Classification

Help on Dana Class: Dana Class:

38.02.03.08 (38)Anhydrous Phosphates, etc

(38.02)(A+ B++)5 (XO4)3

(38.02.03)Alluaudite-Wyllieite Group (Alluaudite Subgroup)

38.02.03.01 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 21/a 2/m

38.02.03.02 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 21/a 2/m

38.02.03.03 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m

38.02.03.04 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 21/a 2/m

38.02.03.05 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m

38.02.03.06 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m

38.02.03.07 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m

38.02.03.08 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m

38.02.03.09 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m

38.02.03.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m

38.02.03.11 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m

38.02.03.12 IMA2008-064! Na16Mn25Al8(PO4)30 Pc m

Help on Strunz Class: Strunz Class:

08.AC.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.10 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m

08.AC.10 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m

08.AC.10 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 21/a 2/m

08.AC.10 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/c 2/m

08.AC.10 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 21/a 2/m

08.AC.10 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m

08.AC.10 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m

08.AC.10 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m

08.AC.10 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 21/a 2/m

08.AC.10 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m

08.AC.10 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m

08.AC.10 Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m

08.AC.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m

08.AC.10 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m

Other Johillerite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Dana8, CanMin, v 42, p 717) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Johillerite :
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 Johillerite here :
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Print or Cut-and-Paste your Johillerite Specimen Label here :

Johillerite

Na(Mg,Zn)3Cu(AsO4)3
Dana No: 38.02.03.08 Strunz No: 08.AC.10
Locality:

Notes: