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Roweite

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About RoweiteHide

George Rowe
Formula:
Ca2Mn2+2B4O7(OH)6
Colour:
Light brown; colourless in transmitted light
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.935
Crystal System:
Orthorhombic
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 RoweiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1937
6.DA.25

6 : BORATES
D : Tetraborates
A : Neso-tetraborates
25.4.1.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
4 : Tetraborates
9.4.1

9 : Borates
4 : Borates of Ca and Mn

Physical Properties of RoweiteHide

Vitreous
Transparency:
Transparent
Colour:
Light brown; colourless in transmitted light
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
On {100} or poor {101}
Density:
2.935(5) g/cm3 (Measured)    2.939 g/cm3 (Calculated)

Optical Data of RoweiteHide

Type:
Biaxial (-)
RI values:
nα = 1.646 nβ = 1.658 nγ = 1.660
2V:
Measured: 28° , Calculated: 44°
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak
Pleochroism:
Weak
Comments:
X = very pale brown to colorless; Y = pale amber; Z = yellowish brown.
Comments:
Orientation: X = c; Y = b; Z = a

Chemical Properties of RoweiteHide

Formula:
Ca2Mn2+2B4O7(OH)6

Crystallography of RoweiteHide

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

Type Occurrence of RoweiteHide

General Appearance of Type Material:
Narrow veinlet of almost pure roweite
Place of Conservation of Type Material:
National School of Mines, Paris, France.
Harvard University, Cambridge,Massachusetts, USA, 96252.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 105493, C6291.
Geological Setting of Type Material:
Hydrothermal veinlets transversing Precambrian metamorphosed Zn-Mn-Fe orebody (Franklin, NJ).
Associated Minerals at Type Locality:
Reference:
Berman, H., Gonyer, F.A. (1937) Roweite, a new mineral from Franklin, New Jersey. American Mineralogist: 22: 301-303.

Other Language Names for RoweiteHide

German:Roweit
Russian:Ровеит
Spanish:Roweita

Relationship of Roweite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Clinochrysotile1 photo of Roweite associated with Clinochrysotile on mindat.org.
Sphalerite1 photo of Roweite associated with Sphalerite on mindat.org.
Johnbaumite1 photo of Roweite associated with Johnbaumite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.DA.10BoraxNa2(B4O5)(OH)4 · 8H2OMon. 2/m : B2/b
6.DA.15TincalconiteNa2(B4O7) · 5H2OTrig. 3 2 : R3 2
6.DA.20HungchaoiteMg(B4O7) · 9H2OTric. 1
6.DA.25FedorovskiteCa2Mg2B4O7(OH)6Orth. mmm (2/m 2/m 2/m) : Pbam
6.DA.30HydrochlorboriteCa4B8O15Cl2 · 21H2OMon.
6.DA.35UralboriteCa2[B3O3(OH)5 · OB(OH)3]Mon.
6.DA.40BorcariteCa4Mg(B4O6(OH)6)(CO3)2Tric.
6.DA.40NumanoiteCa4Cu(B4O6(OH)6)(CO3)2Mon. 2/m : B2/m
6.DA.60Fontarnauite(Na,K)2(Sr,Ca) (SO4)[B5O8(OH)]·2H2OMon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

25.4.1.2FedorovskiteCa2Mg2B4O7(OH)6Orth. mmm (2/m 2/m 2/m) : Pbam

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.4.2FedorovskiteCa2Mg2B4O7(OH)6Orth. mmm (2/m 2/m 2/m) : Pbam

Other InformationHide

Notes:
Perfectly soluble in dilute HCl, solution giving boron reaction with turmeric paper.

Fuses at 1 (candle flame) to a black glass.

Colors the flame faintly green. With boron flux a strong green (boron).

In closed tube turns brown, gives off water and after long heating melts to a glass.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for RoweiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Berman, H., Gonyer, F.A. (1937) Roweite, a new mineral from Franklin, New Jersey. 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.
Malinko, S.V., Stolyarova, T.I., Shashkin, D.P. (1972) The first finding of magnesium
roweite, its paragenesis and products of replacement. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 101: 465–473 (in Russian).
Moore, P.B., Araki, T. (1974) Roweite, Ca2Mn2+2(OH)4[B4O7(OH)2]: Its atomic arrangement. American Mineralogist: 59: 60-65.
Aristarain, L.F., Erd, R.C., Eberlein, G.D. (1974) Roweite from Franklin, New Jersey: a restudy. American Mineralogist: 59: 66–70.
Yamnova, N.A., Simonov, M.A., Belov, N.V. (1975) Crystallochemical structure of roweite, Ca2(Mn,Mg)2[B4O7(OH)2](OH)4. Doklady Acad. Nauk SSSR: 221: 1326–1329 (in Russian).
Dunn, P.J. (1995) Franklin and Sterling Hill, New Jersey. No publisher: 641–642.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Ando, T., Kanayama, A., Kobayashi, S., Miyawaki, R., Kishi, S., Tanabe, M., Kusachi, I. (2015) Roweite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences: 110(1): 29-34.

Internet Links for RoweiteHide

Localities for RoweiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China
 
  • Inner Mongolia
    • Ulanhad League (Chifeng Prefecture)
      • Linxi Co.
        • Linxi
Pristine Minerals; Jordi Fabre Minerals
Japan
 
  • Okayama
    • Takahashi City
      • Bicchu-cho (Bitchu-cho)
        • Fuka
Ando, T., Kanayama, A., Kobayashi, S., Miyawaki, R., Kishi, S., Tanabe, M., & Kusachi, I. (2015). Roweite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 110(1), 29-34.
Russia
 
  • Zabaykalsky Krai
    • Buriatia Republic (Buryatia)
      • Vitim Plateau
Nikita Chukanov (IR- and EDS-analyses); Ando, T., Kanayama, A., Kobayashi, S., Miyawaki, R., Kishi, S., Tanabe, M., & Kusachi, I. (2015). Roweite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 110(1), 29-34.; Malinko, S. V., Stolyarova, T. I., & Shashkin, D. P. (1972). First find of magnesian roweite, its paragenesis and products of replacement. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 101, 465-473.
USA (TL)
 
  • New Jersey
    • Sussex Co.
      • Franklin mining district
        • Franklin
Berman, H., & Gonyer, F. A. (1937). Roweite, a new mineral from Franklin, New Jersey. 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: 378; Dunn(1995):Pt5:641-642.
Mineral and/or Locality  
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