عرض مصدر براسيت

{{بطاقة معدن
| name        = Brassite
| image       = 
| alt         = 
| caption     = 
| category    = [[معادن الزرنيخات]]
| formula     = Mg(AsO<sub>3</sub>OH)·4(H<sub>2</sub>O)
| strunz      = 08.CE.15
| dana        = 39.01.07.01
| symmetry    = Orthorhombic dipyramidal<br />{{Ill-WD2|id=Q903232|نص=تدوين هيرمان-موغين}}: (2/m 2/m 2/m) <br />[[زمرة فراغية]]: P bca
| unit cell   = a = 7.472 Å, b = 10.891 Å, c = 16.585 Å; Z=8
| color       = White
| colour      = 
| habit       = Cryptocrystalline crusts
| system      = [[نظام بلوري معيني قائم]]
| twinning    = 
| cleavage    = {001} Perfect
| fracture    = Irregular/uneven, splintery
| tenacity    = Brittle
| mohs        = 
| luster      = Silky, dull, earthy
| streak      = White
| diaphaneity = Translucent
| gravity     = 2.28
| density     = 
| polish      = 
| opticalprop = Biaxial (+)
| refractive  = n<sub>α</sub> = 1.531 n<sub>β</sub> = 1.546 n<sub>γ</sub> = 1.562
| birefringence = 0.031
| pleochroism = Non-pleochroic
| 2V          = 80°
| dispersion  = r < v moderate
| extinction  = 
| length fast/slow = 
| fluorescence = 
| absorption  = 
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = +++ HCl, + H<sub>2</sub>O
| impurities  = 
| alteration  = 
| other       =
| prop1       =
| prop1text   = 
| references  = <ref name=webminerals>[http://webmineral.com/data/Brassite.shtml Webmineral.com - Brassite] {{Webarchive|url=https://web.archive.org/web/20171201182307/http://www.webmineral.com/data/Brassite.shtml |date=01 ديسمبر 2017}}</ref><ref name=mindat>[http://www.mindat.org/min-756.html Mindat.org - Brassite] {{Webarchive|url=https://web.archive.org/web/20171201182536/https://www.mindat.org/min-756.html |date=01 ديسمبر 2017}}</ref><ref name=HBOM>[http://www.handbookofmineralogy.com/pdfs/brassite.pdf Handbook of Mineralogy - Brassite] {{Webarchive|url=https://web.archive.org/web/20160303195816/http://www.handbookofmineralogy.com/pdfs/brassite.pdf |date=03 مارس 2016}}</ref><ref name=mineralatlas>[https://www.mineralatlas.eu/lexikon/index.php/MineralData?mineral=Brassite Mineralatlas.com - Brassite] {{Webarchive|url=https://web.archive.org/web/20161111122757/https://www.mineralatlas.eu/lexikon/index.php/MineralData?mineral=Brassite |date=11 نوفمبر 2016}}</ref>
}}
'''براسيت''' هو [[معدن]] بالصيغة الكيميائية التالية Mg(AsO<sub>3</sub>OH)·4(H<sub>2</sub>O). يوجد في [[جمهورية التشيك|التشيك]]. لونه أبيض ويترك شريط أبيض. [[انفصام بلوري|انفلاقه البلوري]] تام. بلوراته مكونه من [[نظام بلوري معيني قائم]]-هرمي مضاعف.