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It has a cubic crystal structure with the space group Pa 3 (space group no. 205), the lattice parameter a = 1226 pm and eight formula units per unit cell. [4] This corresponds approximately to a cubic close packing of iodine atoms in which 1/8 of all tetrahedral gaps are occupied by tin atoms. This leads to discrete tetrahedral SnI 4 molecules. [5]
Residential meters: 5/8 inch (commonly referred to as "5/8 x 3/4 inch"), 3/4 inch, and 1 inch. [8] Commercial/Industrial meters: Sizes range from 1½ inches to 12 inches or larger, depending on flow requirements and system design. [8] Europe: Diameters are defined in nominal diameter (DN), measured in millimeters. Common sizes include:
The initial 2018 version of this extension was called Encrypted SNI (ESNI) [11] and its implementations were rolled out in an "experimental" fashion to address this risk of domain eavesdropping. [12] [13] [14] Firefox 85 removed support for ESNI. [15] In contrast to ECH, Encrypted SNI encrypted just the SNI rather than the whole Client Hello. [16]