Cianciulliite Mineral Data

Cianciulliite Mineral Data

General Cianciulliite Information

Chemical Formula:

Mn++++(Mg,Mn++)2Zn2(OH)10·2-4(H2O)

Composition:

Molecular Weight = 473.76 gm

Magnesium 7.70 % Mg 12.76 % MgO

Manganese 17.39 % Mn 7.49 % MnO / 18.35 % MnO₂

Zinc 27.60 % Zn 34.36 % ZnO

Hydrogen 3.40 % H 30.42 % H₂O

Oxygen 43.90 % O

______ ______

100.00 % 103.38 % = TOTAL OXIDE

Empirical Formula:

Mn⁴⁺Mg_1.5Mn²⁺_0.5Zn₂(OH)₁₀·3(H₂O)

Environment:

Secondary mineral from veins in a metamorphosed stratiform zinc orebody.

IMA Status:

Approved IMA 1991

Locality:

Franklin, Sussex County, New Jersey. Link to MinDat.org Location Data.

Name Origin:

Named for John Cianciulli, of Sussex, New Jersey, USA.

Synonym:

ICSD 80795

IMA1990-042

PDF 44-1407

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Cianciulliite Crystallography

Axial Ratios:

a:b:c =2.4289:1:0.8754

Cell Dimensions:

a = 15.47, b = 6.369, c = 5.576, Z = 2; beta = 101.23° V = 538.88 Den(Calc)= 2.92

Crystal System:

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

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

By Intensity(I/I_o): 7.61(1), 2.745(0.6), 3.96(0.5),

Crystal Structure:

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Grice J D , Dunn P J , American Mineralogist , 76 (1991) p.1711-1747, The crystal structure of cianciulliite, Mn(Mg,Mn)2Zn2(OH)10*2-4H2O

Physical Properties of Cianciulliite

Cleavage:

[100] Perfect

Color:

Dark brown, Dark reddish brown, Reddish brown.

Density:

2.87

Diaphaniety:

Subtranslucent to Opaque

Fracture:

Flexible - Flexible fragments.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2 - Gypsum

Luster:

Pearly

Streak:

red brown

Optical Properties of Cianciulliite

Gladstone-Dale:

CI meas= -0.145 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.126 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2877,KPDmeas= 0.2927,KC= 0.2555

Optical Data:

Biaxial (?), a=1.76, g=1.92, bire=0.1600

Pleochroism (x):

opaque.

Pleochroism (y):

dark brown.

Pleochroism (z):

opague.

RL Anisotrophism:

Very weak.

RL Bireflectance:

Very weak.

RL Color:

Gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Cianciulliite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	9.52	9.72
420 nm	9.13	9.30
440 nm	8.85	8.97
460 nm	8.65	8.74
480 nm	8.44	8.56
500 nm	8.34	8.44
520 nm	8.23	8.35
540 nm	8.09	8.25
560 nm	8.06	8.21
580 nm	8.01	8.20
600 nm	7.98	8.18
620 nm	7.96	8.18
640 nm	7.98	8.18
660 nm	7.98	8.18
680 nm	7.93	8.15
700 nm	7.90	8.14

**Calculated Relative Intensity Colors of Cianciulliite in Air**
Relative Intensity	0%	100%	200%	300%	400%	500%	600%	700%	800%	900%	1000%
R₁
R₂

Calculated Properties of Cianciulliite

Electron Density:

r_electron=2.90 gm/cc
note: r_{Cianciulliite}=2.92 gm/cc.

Fermion Index

Fermion Index = 0.01922
Boson Index = 0.98078

Photoelectric:

PE_{Cianciulliite}= 17.87 barns/electron
U=PE_{Cianciulliite} x r_electron= 51.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cianciulliite is Not Radioactive

Cianciulliite Classification

Dana Class:

6.2.13.1 (6)Hydroxides and Oxides Containing Hydroxyl

(6.2)where X++ (OH)2

(6.2.13)Dana Group

6.2.13.1 Cianciulliite Mn(Mg,Mn)2Zn2(OH)10·2-4(H2O) C 2/m 2/m

Strunz Class:

IV/F.11-25 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.11 - Jiansuiite - Birnessite series

IV/F.11-05 Jianshuiite (Mg,Mn)Mn3O7·3(H2O) R 3 or R 3 Trig

IV/F.11-10 Aurorite (Mn,Ag,Ca)Mn3O7·3(H2O) P1 1

IV/F.11-15 Ernienickelite NiMn3O7·3(H2O) R 3 or R 3 Trig

IV/F.11-20 Chalcophanite (Zn,Fe,Mn)Mn3O7·3(H2O) R 3 3

IV/F.11-25 Cianciulliite Mn(Mg,Mn)2Zn2(OH)10·2-4(H2O) C 2/m 2/m

IV/F.11-30 Birnessite (Na,Ca,K)x(Mn,Mn)2O4·1.5(H2O) C 2/m 2/m

Other Cianciulliite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.76,p1708-1710) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Cianciulliite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 - Franklin Minerals(Dunn) 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Cianciulliite

Mn++++(Mg,Mn++)2Zn2(OH)10·2-4(H2O)
Dana No: 6.2.13.1 Strunz No: IV/F.11-25
Locality:

Notes: