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Brianyoungite

Big Photo

Gelbe Birke Mine, Beierfeld, Schwarzenberg District, Erzgebirge, Saxony, Germany
© Thomas Witzke

Show Brianyoungite Photos (17)
Formula:
Zn
 
3
[(OH)
 
4
|(CO
 
3
,SO
 
4
)]
System:MonoclinicColour:White, colourless
Hardness:2 - 2½
Name:For Brian Young (b. 1947), British Geological Survey.


A secondary zinc carbonate-sulphate visually similar to hydrozincite.

Classification of Brianyoungite

IMA status:Approved 1991
Strunz 8th edition ID:5/C.01-105
Nickel-Strunz 10th (pending) edition ID:5.BF.30

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
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Type Occurrence of Brianyoungite

Type Locality:Brownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor District, North Pennines, North and Western Region (Cumberland), Cumbria, England, UK
Year of Discovery:1993

Physical Properties of Brianyoungite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:White, colourless
Streak:White
Hardness (Mohs):2 - 2½
Density (measured):3.93 - 4.09 g/cm3
Density (calculated):4.11 g/cm3

Crystallography of Brianyoungite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 15.724Å, b = 6.256Å, c = 5.427Å
β = 90°
Ratio:a:b:c = 2.513 : 1 : 0.867
Unit Cell Volume:V 533.85 ų (Calculated from Unit Cell)
Z:4
Morphology:Thin tapering blades elongated along [001]; crystals intergrown to form rosettes.
Comment:Crystal structure unknown; monoclinic or orthorhombic - space group assumed to be either P21/m, P21 or P2221.
X-Ray Powder Diffraction:
d-spacingIntensity
15.44 (100)
7.88 (100)
2.714 (40)
1.565 (30b)
5.25 (20)
2.577 (20)

Optical Data of Brianyoungite

Type:Biaxial
RI values: nα = 1.635 nβ = 1.650
Maximum Birefringence:δ = 1.635

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v
Comments:gamma and 2V not determined.

Chemical Properties of Brianyoungite

Formula:
Zn
 
3
[(OH)
 
4
|(CO
 
3
,SO
 
4
)]
Essential elements:C, H, O, Zn
All elements listed in formula:C, H, O, S, Zn

Relationship of Brianyoungite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.BF.05Ferrotychite
Na
 
6
(Fe,Mn,Mg)
 
2
SO
 
4
(CO
 
3
)
 
4
5.BF.05Manganotychite
Na
 
6
Mn
 
2
SO
 
4
(CO
 
3
)
 
4
5.BF.05Northupite
Na
 
3
Mg(CO
 
3
)
 
2
Cl
5.BF.05Tychite
Na
 
6
Mg
 
2
SO
 
4
(CO
 
3
)
 
4
5.BF.10Bonshtedtite
Na
 
3
Fe
2+
 
[PO
 
4
|CO
 
3
]
5.BF.10Bradleyite
Na
 
3
Mg[PO
 
4
|CO
 
3
]
5.BF.10Crawfordite
Na
 
3
Sr[PO
 
4
|CO
 
3
]
5.BF.10Sidorenkite
Na
 
3
Mn
2+
 
[PO
 
4
|CO
 
3
]
5.BF.15Daqingshanite-(Ce)
(Sr,Ca,Ba)
 
2
(Ce,La)PO
 
4
(CO
 
3
,OH,F)
 
3
5.BF.20Reederite-(Y)
Na
 
15
Y
 
2
[Cl|SO
 
3
F|(CO
 
3
)
 
9
]
5.BF.25Mineevite-(Y)
Na
 
25
Ba(Y,Gd,Dy)
 
2
[F
 
2
|Cl|(SO
 
4
)
 
2
|(HCO
 
3
)
 
4
|(CO
 
3
)
 
11
]
5.BF.35Philolithite
Pb
 
12
Mn
2+
 
(Mg,Mn
2+
 
)
 
2
(Mn
2+
 
,Mg)
 
4
[O
 
6
|(OH)
 
12
|(CO
 
3
)
 
4
|SO
 
4
|Cl
 
4
]
5.BF.40Leadhillite
Pb
 
4
SO
 
4
(CO
 
3
)
 
2
(OH)
 
2
5.BF.40Macphersonite
Pb
 
4
SO
 
4
(CO
 
3
)
 
2
(OH)
 
2
5.BF.40Susannite
Pb
 
4
SO
 
4
(CO
 
3
)
 
2
(OH)
 
2

Other Names for Brianyoungite

Synonyms:
IMA1991-053
Other Languages:
German:Brianyoungit
Spanish:Brianyoungita

Other Information

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 Brianyoungite

Reference List:New Mins. (1997), New Minerals 1990-1994.

Livingstone, A. and Champness, P. E. (1993): Brianyoungite, a new mineral related to hydrozincite, from the north of England orefield. Mineralogical Magazine: 57, 665-670.

Schnorrer-Köhler, G. (1994): Brianyoungit, ein neues basisches Zink-Carbonat. Teil I: Sieben Fundstellen in Westdeutschland. Lapis, 19 (5), 24-27.

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    Localities for Brianyoungite

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