Mineral Information and Data:

Bromellite
BeO [CNMNC approved formula]

Named for Magnus von Bromell (1679–1731), Swedish physician and mineralogist.

IMA status : Valid species (Pre-IMA 1825) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
04.02.02.02  
  (04) Simple Oxides
  (04.02) with a cation charge of 2+ (A++ O)
  (04.02.02)
  
Nickel-Strunz
(10th edition) :
04.AB.20
  (04) Oxides and Hydroxides
  (04.A) Metal:Oxygen = 2.1 and 1:1
  (04.AB) M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only
  
Crystal system: Hexagonal System
Point group (H-M): 6mm — dihexagonal-pyramidal
Unit cell: a = 2.6983Å, c = 4.3776Å
Crystal Habit: Crystals prismatic
  
Color: White to creamy white
Diaphaneity: Transparent
Luster: Vitreous
Hardness (Mohs): 9
Measured Density: 3.017 g/cm3
Cleavage: 1; {1010} distinct
  
Geologic Setting: In hydrothermal calcite veins and veinlets in hematite skarn and skarnized limestones (Långban, Sweden); in vugs in natrolite, hydrothermally altered from nepheline, in syenite pegmatite (Langesundsfjord, Norway).
Mineral Association: Swedenborgite, richterite, manganophyllite (Långban, Sweden); natrolite,
diaspore, chamosite (Langesundsfjord, Norway)
  

 

Bromellite
A micro, waterclear, hexagonal or barrel shaped crystal to about 0.3 mm on yellowish calcite with associated magnesioferrite (black)
Origin: Langban, Varmland, Sweden (type locality)
Sample size: 18 x 9 x 10 mm
Photo: Tom Loomis

 

Bromellite
(zoom-in of above)

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