Sussexite Mineral Data

General Sussexite Information

Chemical Formula: MnBO2(OH) Composition: Molecular Weight = 114.75 gm    Manganese  47.87 %  Mn   61.82 % MnO    Boron       9.42 %  B    30.33 % B₂O₃    Hydrogen    0.88 %  H     7.85 % H₂O    Oxygen     41.83 %  O              ______        ______               100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: Mn²⁺BO₂(OH) Environment: Hydrothermal mineral typically in veinlets in boron-bearing metamorphosed Mn-Fe-Zn deposits. IMA Status: Valid Species (Pre-IMA) 1868 Locality: Franklin and Sterling Hill, Ogdensburg, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data. Name Origin: Named for the locality. Name Pronunciation: Sussexite + Pronunciation  

Sussexite Image

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Sussexite Crystallography

Axial Ratios: a:b:c =0.3066:1:1.2004 Cell Dimensions: a = 3.287, b = 10.718, c = 12.866, Z = 8; beta = 95.8° V = 450.95 Den(Calc)= 3.38 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c X Ray Diffraction: By Intensity(I/I_o): 6.32(1), 2.478(0.8), 2.744(0.8), Crystal Structure:

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Hoffmann C , Armbruster T , Schweizerische Mineralogische und Petrographische Mitteilungen , 75 (1995) p.123-133, Crystal structure of a (001) twinned sussexite Mn2B2O4(OH)2 from the Kalahari, Manganese Field South Africa, Locality: Nchwaning II Mine, Kalahari Manganese Field, South Africa

 

Physical Properties of Sussexite

Color: White, Pink, Straw yellow. Density: 3.12 Diaphaneity: Translucent Habit: Fibrous - Crystals made up of fibers. Hardness: 3 - Calcite Luminescence: Non-fluorescent. Luster: Pearly Magnetism: Nonmagnetic Streak: white  

Optical Properties of Sussexite

Gladstone-Dale: CI meas= -0.065 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2101,KPDmeas= 0.2276,KC= 0.2137
Ncalc = 1.67 - 1.72 Optical Data: Biaxial (-), a=1.67, b=1.728, g=1.732, bire=0.0620  

Calculated Properties of Sussexite

Electron Density: Bulk Density (Electron Density)=3.24 gm/cc
note: Specific Gravity of Sussexite =3.38 gm/cc.
Fermion Index: Fermion Index = 0.01
Boson Index = 0.99 Photoelectric: PE_Sussexite = 12.45 barns/electron
U=PE_Sussexite x rElectron Density= 40.34 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sussexite is Not Radioactive  

Sussexite Classification

Dana Class: 25.02.01.01 (25)Anhydrous Borates Containing Hydroxyl or Halogen   (25.02)Dana Type   (25.02.01)Dana Group  

25.02.01.01 Sussexite MnBO2(OH) P 2₁/c 2/m

 

25.02.01.02 Szaibelyite MgBO2(OH) P 2₁/a 2/m

Strunz Class: 06.BA.15 06 - BORATES   06.B - Diborates   06.BA -Neso-diborates with double triangles B2(O,OH)5; 2(2D); 2(2D) + OH, etc.  

06.BA.15 Sussexite MnBO2(OH) P 2₁/c 2/m

 

06.BA.15 Szaibelyite MgBO2(OH) P 2₁/a 2/m

 

Other Sussexite Information

References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Sussexite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Palache)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
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Ask about Sussexite 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

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