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Roweite

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Formula:
Ca
 
2
Mn
2+
2
B
 
4
O
 
7
(OH)
 
6
System:OrthorhombicColour:Light brown; colourless ...
Hardness:5
Name:Named in 1937 by Harry Berman and Forest A. Gonyer in honor of Mr. George Rowe [1868 Cornwall, England, United Kingdom - 1947 USA], Mine Captain and mineral collector, of Franklin, New Jersey, USA.


Fedorovskite-Roweite Series. The manganese analogue of Fedorovskite.

Only one specimen known is known from the type locality (all additional specimens are "crumbs" from the original single specimen).

Classification of Roweite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/H.11-20
Nickel-Strunz 10th (pending) edition ID:6.DA.25

6 : BORATES
D : Tetraborates
A : Neso-tetraborates
Dana 8th edition ID:25.4.1.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
4 : Tetraborates
Hey's CIM Ref.:9.4.1

9 : Borates
4 : Borates of Ca and Mn
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Type Occurrence of Roweite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Year of Discovery:1937
Geological Setting of type material:Hydrothermal veinlets transversing Precambrian metamorphosed Zn-Mn-Fe orebody (Franklin, NJ).
Associated Minerals at type locality:
Willemite

Physical Properties of Roweite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Light brown; colourless in transmitted light
Hardness (Mohs):5
Tenacity:Brittle
Cleavage:Poor/Indistinct
On {101}

Crystallography of Roweite

Crystal System:Orthorhombic
Cell Parameters:a = 9.05Å, b = 13.35Å, c = 8.28Å
Ratio:a:b:c = 0.678 : 1 : 0.62
Unit Cell Volume:V 1,000.37 ų (Calculated from Unit Cell)
Morphology:Crystals rough, lath-shaped, flattened {010} and elongated [001]. Terminations not measurable.

Optical Data of Roweite

Type:Biaxial (-)
RI values: nα = 1.646 nβ = 1.658 nγ = 1.660
2V:Measured: 28° , Calculated: 44°
Maximum Birefringence:δ = 0.014

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak

Chemical Properties of Roweite

Formula:
Ca
 
2
Mn
2+
2
B
 
4
O
 
7
(OH)
 
6
Simplified for copy/paste:Ca2Mn2+2B4O7(OH)6
Essential elements:B, Ca, H, Mn, O
All elements listed in formula:B, Ca, H, Mn, O

Relationship of Roweite to other Species

Series:Forms a series with Fedorovskite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
6.DA.10Borax
Na
 
2
(B
 
4
O
 
5
)(OH)
 
4
· 8H
 
2
O
6.DA.15Tincalconite
Na
 
2
(B
 
4
O
 
7
) · 5H
 
2
O
6.DA.20Hungchaoite
Mg(B
 
4
O
 
7
) · 9H
 
2
O
6.DA.25Fedorovskite
Ca
 
2
Mg
 
2
B
 
4
O
 
7
(OH)
 
6
6.DA.30Hydrochlorborite
Ca
 
4
B
 
8
O
 
15
Cl
 
2
· 21H
 
2
O
6.DA.35Uralborite
Ca
 
2
[B
 
3
O
 
3
(OH)
 
5
· OB(OH)
 
3
]
6.DA.40Borcarite
Ca
 
4
Mg(B
 
4
O
 
6
(OH)
 
6
)(CO
 
3
)
 
2
6.DA.40Numanoite
Ca
 
4
Cu(B
 
4
O
 
6
(OH)
 
6
)(CO
 
3
)
 
2
6.DA.60Fontarnauite
(Na,K)
 
2
(Sr,Ca)B
 
4
SH
 
8
O
 
15
Related Minerals - Hey's Index Grouping:

- +
9.4.2Fedorovskite
Ca
 
2
Mg
 
2
B
 
4
O
 
7
(OH)
 
6

Other Names for Roweite

Other Languages:
German:Roweit
Russian:Ровеит
Spanish:Roweita

Other Information

Other Information:Readily soluble in dilute HCl.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Roweite

Reference List:

- +
Berman and Gonyer (1937) American Mineralogist: 22: 301-303.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 377-378.

American Mineralogist (1974): 59: 60-65.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Roweite

Search Engines:
  • Look for Roweite on Google
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  • External Links:
  • Look for Roweite on Webmineral
  • Look for Roweite on Athena Mineralogy
  • Look for Roweite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Roweite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Find Roweite on www.crystalclassics.co.uk
  • Buy from David K Joyce minerals
  • Fabre Minerals - search for Roweite specimens
  • Fine Minerals from Weinrich Minerals, Inc.
  • Localities for Roweite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia Republic (Buryatia)
          • Vitim Plateau
    Nikita Chukanov (IR- and EDS-analyses)
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 378; Dunn(1995):Pt5:641-642.
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