Paralaurionite
| Paralaurionite | ||
|---|---|---|
Specific gravity 6.05–6.15 | | |
| Optical properties | Biaxial (−) | |
| Refractive index | nα = 2.050 nβ = 2.150 nγ = 2.200 | |
| Birefringence | δ = 0.150 | |
| Pleochroism | Visible | |
| References | [2][3][4][5] | |
Paralaurionite is a colorless mineral consisting of a basic
dimorphous with laurionite. It is a member of the matlockite group.[6] The name is derived from para-, the Greek for "near", and laurionite, because of its polymorphic relationship to it.[4] Bright, yellow tips of thorikosite can form on paralaurionite crystals and paralaurionite may also be intergrown with mendipite.[7][8]
Occurrence
It was first described in 1899 for an occurrence in
In 1952 an occurrences of it was reported from the Mammoth Mine, Arizona.[9]It occurs in lead bearing slag which has been exposed to seawater. It also occurs in polymetallic ore deposits. It occurs associated with laurionite,
References
- S2CID 235729616.
- ^ Mineralienatlas
- ^ a b c Handbook of Mineralogy
- ^ a b Paralaurionite on Mindat.org
- ^ Paralaurionite on Webmineral
- ^ Mineralogical magazine. Mineralogical Society, HighWire Press. 1 January 2006. pp. 643–8. Retrieved 26 January 2012.
- ^ The Mineralogical record. 1986. pp. 185–88. Retrieved 26 January 2012.
- ISBN 978-0-13-647553-8. Retrieved 26 January 2012.
- ^ Mineralogical Society (Great Britain) (1952). The Mineralogical magazine and journal of the Mineralogical Society. Mineralogical Society. pp. 341–2. Retrieved 26 January 2012.
Oujda-Angad Province
, Morocco. Size: 6 x 5.5 x 5 cm.
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