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Roscherite

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Gunnislake Clitters Mine, Gunnislake Area, Callington District, Cornwall, England, UK
© Ian Jones

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Formula:
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)
 
5
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
System:MonoclinicColour:Dark green, olive-green, ...
Hardness:4½
Name:Named after Herr Walter Roscher, German mineral collector of Ehrenfriedersdorf, Saxony, Germany.


Roscherite Group.

Occurs in cavities in granite or in complex zoned granitic pegmatites.

Classification of Roscherite

IMA status:Approved
Strunz 8th edition ID:7/D.01-60
Nickel-Strunz 10th (pending) edition ID:8.DA.10

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
Dana 8th edition ID:42.7.7.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
Hey's CIM Ref.:19.3.12

19 : Phosphates
3 : Phosphates of Be and Mg
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Type Occurrence of Roscherite

Type Locality:Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Place of Conservation of Type Material:Charles University, Prague, Czech Republic: #6472. The Natural History Museum, London, England: #1914,1381. U.S. National Museum of Natural History, Washington, D.C., USA: #R6219.
Year of Discovery:1914
Geological Setting of type material:Granite
Associated Minerals at type locality:
TourmalineMoriniteLacroixiteEosphoriteApatite

Occurrences of Roscherite

Geological Setting:Miarolitic cavities in granites, complex zoned granitic pegmatites

Physical Properties of Roscherite

Diaphaneity (Transparency):Translucent
Colour:Dark green, olive-green, brown, red, orange, greenish gray; yellowish green to brown in transmitted light
Comment:May exhibit abnormal interference colours.
Hardness (Mohs):4½
Cleavage:Distinct/Good
n {001}, good; on {010}, distinct.
Density (measured):2.9 - 2.97 g/cm3
Density (calculated):2.77(8) g/cm3

Crystallography of Roscherite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 15.88Å, b = 11.9Å, c = 6.62Å
Ratio:a:b:c = 1.334 : 1 : 0.556
Unit Cell Volume:V 0.00 ų (Calculated from Unit Cell)
Z:4
Morphology:Short prismatic [001], with an eight-or six-sided cross section; also or flattened on {100} or {010} thin tabular, and elongated [010], with forms {010}, {110}, and {111}. Spherical to botryoidal aggregates and crusts with an internally firbous structure; pulverulent massive.
Comment:Monoclinic Space Group: C2/c, β = 94°42'. May be Triclinic with Space group C-1, with a = 15.921, b = 11.965, c = 6.741. α = 91°04', β = 94°21', γ = 89°59.5'

Optical Data of Roscherite

Type:Biaxial (-)
RI values: nα = 1.624 - 1.628 nβ = 1.639 - 1.644 nγ = 1.643 - 1.650
Maximum Birefringence:δ = 0.019 - 0.022

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v strong
Pleochroism:Visible
Comments:X = Yellow to olive green
Y = Yellow-brown, greenish brown
Z = Chestnut brown
Comments:2V measured: large.

Chemical Properties of Roscherite

Formula:
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)
 
5
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
Essential elements:Be, Ca, H, Mn, O, P
All elements listed in formula:Be, Ca, Fe, H, Mn, O, P

Relationship of Roscherite to other Species

Member of Group:
Roscherite Group:
Common Associates:
QuartzMuscoviteBeryl
Related Minerals - Nickel-Strunz Grouping):

- +
8.DA.05Bearsite
Be
 
2
[OH|AsO
 
4
] · 4H
 
2
O
8.DA.05Moraesite
Be
 
2
[OH|PO
 
4
] · 4H
 
2
O
8.DA.10Zanazziite
Ca
 
2
(Mg,Fe)(Mg,Fe,Al)
 
4
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
8.DA.10Greifensteinite
Ca
 
2
(Fe
2+
 
, Mn)
 
5
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
8.DA.10Atencioite
Ca
 
2
Fe
2+
 
Mg
 
2
Fe
2+
2
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
8.DA.10Ruifrancoite
Ca
 
2
[ ]
 
2
(Fe
3+
 
,Mn
2+
 
,Mg)
 
4
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
(OH,H
 
2
O)
 
2
 · 4H
 
2
O
8.DA.10Guimarãesite
Ca
 
2
(Zn,Mg,Fe
2+
 
)
 
5
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
8.DA.10Footemineite
Ca
 
2
Mn
2+
 
Mn
2+
2
Mn
2+
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
 · 6H
 
2
O
8.DA.15Uralolite
Ca
 
2
Be
 
4
[OH|PO
 
4
]
 
3
 · 5H
 
2
O
8.DA.20Weinebeneite
CaBe
 
3
[OH|PO
 
4
]
 
2
 · 4H
 
2
O
8.DA.25Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
[OH|(PO
 
4
)
 
3
]
 
2
 · H
 
2
O
8.DA.30Veszelyite
(Cu,Zn)
 
2
Zn(PO
 
4
)
 
2
·2H
 
2
O
8.DA.35Kipushite
(Cu,Zn)
 
5
Zn[(OH)
 
3
|PO
 
4
]
 
2
 · H
 
2
O
8.DA.35Philipsburgite
(Cu,Zn)
 
6
[(OH)
 
3
|(AsO
 
4
,PO
 
4
)]
 
2
 · H
 
2
O
8.DA.40Spencerite
Zn
 
4
[OH|PO
 
4
]
 
2
 · 3H
 
2
O
8.DA.45Glucine
CaBe
 
4
[(OH)
 
2
|PO
 
4
]
 
2
 · 0.5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
19.3.1Moraesite
Be
 
2
[OH|PO
 
4
] · 4H
 
2
O
19.3.2Beryllonite
NaBe[PO
 
4
]
19.3.3Hurlbutite
CaBe
 
2
[PO
 
4
]
 
2
19.3.4Hydroxylherderite
CaBe[(OH,F)|PO
 
4
]
19.3.5Glucine
CaBe
 
4
[(OH)
 
2
|PO
 
4
]
 
2
 · 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
[HPO
 
4
|PO
 
4
]
 
2
 · 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
[OH|PO
 
4
]
 
3
 · 5H
 
2
O
19.3.9Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
·38H
 
2
O
19.3.10Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
[OH|(PO
 
4
)
 
3
]
 
2
 · H
 
2
O
19.3.11Gainesite
Na(Na,K)(Be,Li)Zr
 
2
[PO
 
4
]
 
4
 · 1.5-2H
 
2
O
19.3.13Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
·6H
 
2
O
19.3.14Farringtonite
Mg
 
3
[PO
 
4
]
 
2
19.3.15Holtedahlite
Mg
 
2
[OH|PO
 
4
]
19.3.16Althausite
Mg
 
2
[(OH,F)|PO
 
4
]
19.3.17Newberyite
MgHPO
 
4
·3H
 
2
O
19.3.18Phosphorrösslerite
MgHPO
 
4
·7H
 
2
O
19.3.19Bobierrite
Mg
 
3
(PO
 
4
)
 
2
·8H
 
2
O
19.3.20Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
·8H
 
2
O
19.3.21Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
[PO
 
4
]
 
2
19.3.22Dittmarite
NH
 
4
MgPO
 
4
·H
 
2
O
19.3.23Struvite
NH
 
4
MgPO
 
4
·6H
 
2
O
19.3.24Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
·8H
 
2
O

Other Names for Roscherite

Other Languages:
German:Roscherit
Russian:Росчерит
Spanish:Roscherita

Other Information

Other Information:Soluble in acids.
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 Roscherite

Reference List:Slavík (1914) Česká Akademie véd a umĕnē u Praze - Bull. intern. ac. sc. Bohême, no. 4.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 174.

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, 1124 pp.: 968-969.

Lindberg, M.L. (1958) The beryllium content of roscherite from the Sapucaia pegmatite mine, Minas Gerais, Brazil, and from other localities. American Mineralogist: 43: 824–838.

Fanfani, L., P.F. Zanazzi, and A.R. Zanzari (1977) The crystal structure of a triclinic roscherite. Tschermaks Mineral. Petrog. Mitt., 24, 169–178.

American Mineralogist (1978): 63: 427.

Clark, A.M., E.E. Fejer, A.G. Couper, O. von Knorring, R.W. Turner, and R.W. Barstow (1983) Iron-rich roscherite from Gunnislake, Cornwall. Mineralogical Magazine: 47: 81–83.

Leavens, P.B., J.S. White, and J.A. Nelen (1990) Zanazziite, a new mineral from Minas Gerais, Brazil. Mineralogical Record, 21, 413–417.

Tschermaks Mineralogische und Petrographische Mitteilungen: 22: 266-277. (for triclinic 'roscherite')

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 504.

Rastsvetaeva, R.K., Chukanov, N.V., Verin, I.A. (2005): Crystal structure of roscherite. Doklady Chemistry, 403, 160-163.

Internet Links for Roscherite

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    Localities for Roscherite

    Hide Locality List
    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.
    Austria
     
    • Carinthia
      • Koralpe Mts
        • Moschkogel Mt. - Weinebene area
          • Brandrücken
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Doce valley
          • Divino das Laranjeiras
            • Linópolis
    		Cassedanne, J.P. (1983): Famous mineral localities: The Córrego Frio mine and vicinity, Minas Gerais, Brazil. Mineralogical Record, 14 (4): 227-237
          • Galiléia
            • Laranjeiras
    		No reference listed
    [MinRec 12:69]
            • Sapucaia do Norte
    		No reference listed
        • Jequitinhonha valley
          • Itinga
            • Monte Belo
            • Taquaral
    		[MinRec 21:413]
              • Piauí Valley
    Germany
     
    • Saxony
      • Erzgebirge
        • Ehrenfriedersdorf
    		Slavik, F. (1914): Neue Phosphate vom Greifenstein bei Ehrenfriedersdorf.- Bulletin international de l’ Academie des Sciences de Bohéme, 19, 1-16; 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: 783, 969.
    Portugal
     
    • Guarda District
      • Sabugal
    		Schnorrer-Köhler (1991), Mineral Occurrences.
    UK
     
    • England
      • Cornwall
        • Callington District
          • Gunnislake Area
    		No reference listed
    USA
     
    • Connecticut
      • Middlesex Co.
        • East Hampton
    		Rocks & Min.: 70:403
    • Maine
      • Cumberland Co.
        • Baldwin
    		No reference listed
      • Oxford Co.
        • Buckfield
    		King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1, King, V. (ed.), 2000, Mineralogy of Maine, V. 2.
        • Newry
    		Dunn, P.J. & Gaines, R.V. (1978): Uralolite from the Dunton Gem Mine, Newry, Maine: A second occurrence. Mineralogical Record 9(2), 99-100
    King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2
    King, V, 2006, Minerals of Halls Ridge and Plumbago-Puzzle Mountain, Newry, Oxford County, Maine, Mineral News, v. 22 (6), p. 1-3.
        • Paris
    		King, V. and Foord, E., 1994, Mineralogy of Maine.
        • Rumford
    		King & Foord, 1994. Mineralogy of Maine, V. 1.; King and Foord, 2000, Addenda to Volume 1, Mineralogy of Maine, v. 2.
    • New Hampshire
      • Grafton Co.
        • Groton
    		No reference listed
    No reference listed
      • Sullivan Co.
        • Newport
    		No reference listed
    • North Carolina
      • Cleveland Co.
        • Kings Mountain District
    		Am Min 54 (1969), 1467-1469
    • South Dakota
      • Custer Co.
        • Custer District
          • Fourmile
    		Rocks & Minerals: 60: 117; Rocks & Minerals: 79: 342.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Nov 2009 02:13:31