Nickenichite Mineral Data

Nickenichite Mineral Data +

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General Nickenichite Information

Chemical Formula:

Na0,8Ca0,4(Mg,Fe+++,Al)3Cu0,4(AsO4)3

Composition:

Molecular Weight = 549.61 gm

Sodium 3.35 % Na 4.51 % Na₂O

Calcium 2.19 % Ca 3.06 % CaO

Magnesium 10.61 % Mg 17.60 % MgO

Aluminum 0.49 % Al 0.93 % Al₂O₃

Iron 4.06 % Fe 5.81 % Fe₂O₃

Copper 3.47 % Cu 3.91 % Cu₂O

Arsenic 40.90 % As 62.73 % As₂O₅

Oxygen 34.93 % O

______ ______

100.00 % 98.54 % = TOTAL OXIDE

Empirical Formula:

Na_0.8Ca_0.3Cu_0.3Mg_2.4Fe³⁺_0.4Al_0.1(AsO₄)₃

Environment:

In a cavity in volcanic scoria.

IMA Status:

Approved IMA 1993

Locality:

Nickenich village, near the Nickenicher Sattel Volcano, Eifel district, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 74468

IMA1992-015

PDF 48-1867

Nickenichite Image

Images:

Nickenichite

Comments: Blue crystals of nickenichite on matrix.
Location: Nickenich, near Kruft, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Nickenichite Crystallography

Axial Ratios:

a:b:c =0.9305:1:0.5205

Cell Dimensions:

a = 11.882, b = 12.769, c = 6.647, Z = 4; beta = 112.81° V = 929.62 Den(Calc)= 3.93

Crystal System:

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

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

By Intensity(I/I_o): 2.744(1), 3.195(0.6), 4.06(0.5),

Crystal Structure:

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Auernhammer M , Effenberger H , Hentschel G , Reinecke T , Tillmanns E , Mineralogy and Petrology , 48 (1993) p.153-166, Nickenichite, a new arsenate from the Eifel, Germany, Locality: Nickenich, Nickenicher Sattel, Eifel, Germany

Physical Properties of Nickenichite

Cleavage:

[010] Perfect, [100] Good, [101] Good

Color:

Greenish blue, Light blue.

Diaphaniety:

Transparent

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Optical Properties of Nickenichite

Gladstone-Dale:

CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1901,KC= 0.1812

Optical Data:

Biaxial (+), a=1.714, b=1.744, g=1.783, bire=0.0690, 2V(Calc)=86, 2V(Meas)=60-84.

Pleochroism (x):

light blue.

Pleochroism (z):

blue.

Calculated Properties of Nickenichite

Electron Density:

r_electron=3.70 gm/cc
note: r_Nickenichite=3.93 gm/cc.

Fermion Index

Fermion Index = 0.01167
Boson Index = 0.98833

Photoelectric:

PE_Nickenichite= 31.49 barns/electron
U=PE_Nickenichite x r_electron= 116.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nickenichite is Not Radioactive

Nickenichite Classification

Dana Class:

38.2.3.9 (38)Anhydrous Phosphates, etc

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

(38.2.3)Alluaudite-Wyllieite Group (Alluaudite Subgroup)

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

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

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

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

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

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

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

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

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

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

Strunz Class:

VII/A.07-30 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na

VII/A.07 - Johillerite - Nickenichite series

VII/A.07-10 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m

VII/A.07-15 Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m

VII/A.07-20 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m

VII/A.07-30 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m

Other Nickenichite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.79,p570-574,1994) OPTIC PROP.(Am.Min.,Vol.79,p570-574,1994)

See Also:

Links to other databases for Nickenichite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Nickenichite

Na0,8Ca0,4(Mg,Fe+++,Al)3Cu0,4(AsO4)3
Dana No: 38.2.3.9 Strunz No: VII/A.07-30
Locality:

Notes: