Roweite Mineral Data

General Roweite Information

Chemical Formula:

Ca2Mn++2B4O7(OH)6

Composition:

Molecular Weight = 447.31 gm

Calcium 17.92 % Ca 25.07 % CaO

Manganese 24.56 % Mn 31.72 % MnO

Boron 9.67 % B 31.13 % B₂O₃

Hydrogen 1.35 % H 12.08 % H₂O

Oxygen 46.50 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mn²⁺₂B₄O₇(OH)₆

Environment:

Hydrothermal veins in a metamorphosed stratiform zinc orebody.

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

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

Name Origin:

Named for George Rowe (1868-1947), Mine Captain at Franklin, New Jersey, USA, and long-time collector of Franklin minerals.

Name Pronunciation:

Roweite

Synonym:

ICSD 6172

PDF 26-1065

Roweite Image

Images:

Roweite

Comments: Pinkish nodular massive roweite.
Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Roweite Crystallography

Axial Ratios:

a:b:c =0.678:1:0.6205

Cell Dimensions:

a = 9.057, b = 13.357, c = 8.289, Z = 4; V = 1,002.76 Den(Calc)= 2.96

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbam

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

By Intensity(I/I_o): 3.974(1), 2.6(0.72), 2.184(0.49),

Physical Properties of Roweite

Cleavage:

{001} Indistinct, {021} Indistinct, {100} Distinct

Color:

Light brown.

Density:

2.935

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

light brown

Optical Properties of Roweite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2212,KPDmeas= 0.2231,KC= 0.2231
Ncalc = 1.65 - 1.66

Optical Data:

Biaxial (-), a=1.646, b=1.658, g=1.66, bire=0.0140, 2V(Calc)=44, 2V(Meas)=28.

Calculated Properties of Roweite

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Roweite =2.94 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Roweite= 8.54 barns/electron
U=PE_Roweite x rElectron Density= 24.65 barns/cc.

Radioactivity:

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

Roweite Classification

Dana Class:

25.04.01.01 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.04)Dana Type

(25.04.01)Dana Group

25.04.01.01 Roweite Ca2Mn2B4O7(OH)6 Pbam 2/m 2/m 2/m

25.04.01.02 Fedorovskite Ca2(Mg,Mn)2B4O7(OH)6 Pbam 2/m 2/m 2/m

Strunz Class:

06.DA.25 06 - BORATES

06.D - Tetraborates

06.DA -Neso-tetraborates

06.DA.25 Fedorovskite Ca2(Mg,Mn)2B4O7(OH)6 Pbam 2/m 2/m 2/m

06.DA.25 Roweite Ca2Mn2B4O7(OH)6 Pbam 2/m 2/m 2/m

Other Roweite 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 Roweite :
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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Print or Cut-and-Paste your Roweite Specimen Label here :

Roweite

Ca2Mn++2B4O7(OH)6
Dana No: 25.04.01.01 Strunz No: 06.DA.25
Locality:

Notes:

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