Clinobirnessite Mineral Data

General Clinobirnessite Information

Chemical Formula:

Na4Mn14O27•9(H2O)

Composition:

Molecular Weight = 1,455.21 gm

Sodium 6.32 % Na 8.52 % Na₂O

Manganese 52.85 % Mn 37.97 % Mn₂O₃ / 41.82 % MnO₂

Hydrogen 1.25 % H 11.14 % H₂O

Oxygen 39.58 % O

______ ______

100.00 % 99.45 % = TOTAL OXIDE

Empirical Formula:

Na₄Mn³⁺₇Mn⁴⁺₇O₂₇•9(H₂O)

IMA Status:

Not Approved IMA

Locality:

Link to MinDat.org Location Data.

Name Origin:

Name as the monoclinic polymorph of birnessite.

Clinobirnessite Crystallography

Axial Ratios:

a:b:c =0.5549:1:0.4548

Cell Dimensions:

a = 8.54, b = 15.39, c = 7, Z = 1; beta = 132.2° V = 681.55 Den(Calc)= 3.55

Crystal System:

Monoclinic

Optical Properties of Clinobirnessite

Optical Data:

NCalc= 2.18 - from Gladstone-Dale relationship (KC = 0.3331) where Ncalc=Dcalc*KC+1

Calculated Properties of Clinobirnessite

Electron Density:

Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Clinobirnessite =3.55 gm/cc.

Fermion Index:

Fermion Index = 0.0001918558
Boson Index = 0.9998081442

Photoelectric:

PE_{Clinobirnessite}= 13.75 barns/electron
U=PE_{Clinobirnessite} x rElectron Density= 46.95 barns/cc.

Radioactivity:

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

Clinobirnessite Classification

Dana Class:

04.00.00.00 (04)Oxide Minerals

(04.00)Without Dana Classification Numbers

(04.00.00)Oxide, Hydrated

04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m

04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho

04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono

04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono

04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m

04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho

04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig

04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m

04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 6₃/m,P 6₃ Hex

04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m

Strunz Class:

04.XX.00 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.X - Unclassified Strunz OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, telluri

04.XX -Oxide, Hydrated

04.XX.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m

04.XX.00 Methane hydrate-I! 46(H2O)•2(S)•6(L) P m3n 4/m 3 2/m

04.XX.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono

04.XX.00 Chubutite* Pb7O6Cl2 Unk Ortho

04.XX.00 Kleberite* FeTi6O13•4(H2O)(?) P 6₃mcm ? 6mm

04.XX.00 Hongquiite* TiO F m3m 4/m 3 2/m

04.XX.00 Psilomelane? (Ba,H2O)2Mn5O10 A2/m 2/m

04.XX.00 Struverite? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m

04.XX.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 6₃/m,P 6₃ Hex

04.XX.00 Uhligite? Ca3(Ti,Al,Zr)9O20 Unk Cubic

04.XX.00 Scheteligite? (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho

04.XX.00 Allendeite! Sc4Zr3O12 R 3 3

04.XX.00 IMA2000-016! (Ti,Fe,Mg,Mn)1-xTi2O5 Pban 2/m 2/m 2/m

04.XX.00 Methane hydrate-II! 136(H2O)•16(S)•8(L) F d3m 4/m 3 2/m

04.XX.00 IMA2000-026! (Mn,Li)4(Ta,Sn)4(Ta,Nb)8O32 C 2/c 2/m

04.XX.00 Methane hydrate-H! 34(H2O)•3(S)•2(M)•1(L) P 6/mmm 6/m 2/m 2/m

Other Clinobirnessite Information

References:

PHYS. PROP.(37th List of New Min.,Min. Mag.,1996)

See Also:

Links to other databases for Clinobirnessite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Clinobirnessite

Na4Mn14O27•9(H2O)
Dana No: 04.00.00.00 Strunz No: 04.XX.00
Locality:

Notes:

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